#5631: The Incense Recipe Nobody Could Copy

Eleven spices, 368 maneh, and one pinch of smoke-raiser that even Alexandria's scientists couldn't crack.

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The Ketoret — the incense offering — was arguably the most prestigious service in the Mishkan and the Temple, burned every morning and evening on a golden altar, and carried by the High Priest into the Holy of Holies once a year on Yom Kippur. And yet there is no synagogue on earth that performs an equivalent today.

The recipe starts with four ingredients named in Exodus 30: nataf (stacte), shechelet (onycha), chelbenah (galbanum), and pure frankincense. The Oral Law reads the grammar of that verse — "spices" plural, three names given, "spices" repeated, frankincense named separately — to arrive at eleven. The baraita Pitum HaKetoret in Keritot 6 lays out the full list with weights: four primary spices at seventy maneh each, four secondary at sixteen each, and three more, totaling 368 maneh. Three hundred sixty-five correspond to the days of the solar year; the extra three are reserved for Yom Kippur.

Not everything is settled. Maimonides admitted he could not identify cassia. The identity of onycha is disputed between a sea-snail operculum and an animal product. Kipat hayarden is variously ambergris, a plant, or a Jordan rose. And galbanum — the one foul-smelling ingredient — is read by Rashi as representing the sinners of Israel, mandatory precisely so they aren't written off.

The processing was a trade: onycha scrubbed with lye and soaked in Cyprus wine, ingredients re-pounded twice a year, seasonal handling to manage mold and pungency, workers chanting in time with the pestle. Urine would have worked better as a solvent; it was banned for the dignity of the Temple. Honey disqualified a batch entirely.

The House of Avtinas compounded the incense and kept the technique secret. The Mishnah curses them for it; the Talmud records their defense — that they feared the formula would be misused after the Temple's destruction. When Greek scientists from Alexandria were brought in to reverse-engineer it, they identified everything except the ma'aleh ashan, the smoke-raiser that made the smoke rise in a straight column. That pinch was lost in 70 CE. The formula is written down. The smoke-raiser isn't.

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#5631: The Incense Recipe Nobody Could Copy

Corn
Here's what Daniel wrote in this week. He says the Ketoret, the incense offering, was a central part of the Temple service, and yet to a lot of Jews today incense feels like a completely foreign concept. He wants the unique blend documented in the scriptures, how it was procured and mixed and blended, and what was actually in it.
Herman
Four questions in one breath. That's Daniel.
Corn
It's four, and they're all good, so let's do all four. What it was, what was in it, how it was made, and why it's strange to us now.
Herman
Start with the strange part, because it's the hook. The most prestigious service in the entire Mishkan, and there is no synagogue on earth that does the equivalent. Not one.
Corn
Prestigious how?
Herman
Chabad calls it maybe the most prestigious service in the Tabernacle and the Temple. And there's a teaching from the Lubavitcher Rebbe on the word itself. Korban, the word for sacrifice, comes from the root meaning close. Ketoret comes from keter, which is Aramaic for bond.
Corn
Close versus bonded. Proximity versus connection.
Herman
Right. The offerings brought you near. The incense was the inner thing.
Corn
So what was it, physically?
Herman
A golden altar at the end of the Sanctuary, right up against the curtain that separated it from the Holy of Holies. Burned every morning and every evening. That's why it's called ketoret hatamid, the regular incense. Exodus, chapter thirty, verses seven and eight.
Corn
Twice a day, every day.
Herman
And once a year, one exception. Yom Kippur. The High Priest takes coals from the altar in a censer, two handfuls of incense, and goes inside the Holy of Holies, and the smoke rises in front of the mercy seat over the Ark. Leviticus sixteen.
Corn
That's the only day anybody goes in there.
Herman
That's the only day. And the incense is what he carries in.
Corn
It also stops a plague at one point, doesn't it?
Herman
After Korach's rebellion. Aaron runs into the middle of the assembly with the incense and the plague halts. Numbers seventeen.
Corn
So the recipe has a body count attached to it in both directions.
Herman
That's one way to put it.
Corn
Alright. So that's what it was. Now what was in it. Because the Torah gives us four ingredients and the rabbis give us eleven, and I want to know how you get from one number to the other.
Herman
Exodus thirty, verse thirty-four. Four names. Nataf, which gets translated stacte. Shechelet, onycha. Chelbenah, galbanum. And levonah zakh, pure frankincense. And the verse says of each there shall be a like weight.
Corn
Four. Equal parts, apparently.
Herman
That's the surface. Now watch the derivation, because this is the part that either delights you or makes you pull your hair out. The verse says spices, plural. Plural means at least two. Then it names three, nataf, shechelet, galbanum. Two plus three is five. Then it says spices again, which the Sages read as doubling the five to ten. Then frankincense is named separately at the end. Eleven.
Corn
That's a reading of the grammar.
Herman
It's a reading of the grammar. Keritot, page six.
Corn
I want to be clear for listeners that this is not a hidden code. This is how the Oral Law reads a verse.
Herman
It's exegesis, yes. And the result is a full ingredient list with weights, in a baraita called Pitum HaKetoret. Same page.
Corn
Give me the list.
Herman
Four primary spices at seventy maneh each. Balm, which is tzori. Onycha, tzipporen. Galbanum, chelbenah. And frankincense, levonah. That's two hundred and eighty maneh.
Corn
Seventy each. Those are the big four.
Herman
Then four secondary at sixteen maneh each. Myrrh, cassia, spikenard, saffron. Sixty-four maneh.
Corn
And the last three?
Herman
Costus at twelve maneh, aromatic bark, kilufah, at three, and cinnamon at nine.
Corn
Which totals?
Herman
Three hundred and sixty-eight maneh.
Corn
That's not a round number. Which means it's not an accident.
Herman
Three hundred and sixty-five of those maneh correspond to the days of the solar year. One maneh per day, half burned in the morning, half in the afternoon.
Corn
And the extra three?
Herman
Reserved for Yom Kippur. That's what the High Priest takes his handfuls from when he goes into the Holy of Holies. He returns them to the mortar the day before and grinds them very thoroughly.
Corn
So the annual batch is a calendar.
Herman
The annual batch is a calendar. And there are things in the mixture that don't count toward the eleven at all. Auxiliary substances. Kersannah lye, nine kav. Cyprus wine, three se'a plus three kav. Sodomite salt, a quarter kav. And then two pinches, the ma'aleh ashan, the smoke-raiser, and according to Rabbi Natan, kipat hayarden, Jordan amber.
Corn
Two pinches out of three hundred and sixty-eight maneh, and one of them is the whole story.
Herman
One of them is the whole story. Hold that.
Corn
Before we get there, I want to talk about the identifications, because this is where I expected the tradition to be confident and it isn't.
Herman
It's not. Cassia, the ketziah, is described as perhaps the most difficult of the eleven spices to identify. Maimonides himself, in his commentary on the Mishnah, in Keritot, says he could not identify it.
Corn
Maimonides.
Herman
Maimonides.
Corn
The man who wrote a guide for the perplexed could not tell you what one of the eleven spices was.
Herman
He could not. And kipat hayarden is disputed. Maimonides says ambergris, the waxy stuff from a sperm whale. Others say it's a plant, or a rose that grows along the Jordan.
Corn
A whale product and a flower, and nobody's settled it.
Herman
Nobody's settled it.
Corn
What about the onycha? I've read that one's contested too.
Herman
Onycha comes into English from the Greek for fingernail, because of the shape. The Septuagint uses it. The common identification is the operculum, the little trapdoor shell that closes a sea snail, murex or strombus. But the Talmud describes it as something produced on the ground, and Zohar Amar argues it was an animal product, so there's a genuine split. Josephus, for what it's worth, claims there were thirteen spices, some of them from the sea.
Corn
Josephus rounding up.
Herman
Josephus being Josephus.
Corn
And galbanum.
Herman
Chelbenah. The least pleasant-smelling of the whole list. And Rashi reads its inclusion as representing the sinners of Israel. His line is that we shouldn't lose hope and abandon them.
Corn
So the one ingredient that stinks is the one that teaches you not to write people off.
Herman
That's the reading.
Corn
I keep coming back to that. Ten of the eleven smell sweet. One of them is foul, and it's mandatory, and the reason it's mandatory is a moral argument about who gets included.
Herman
And omitting any single spice was a capital offense. Liable to death at the hand of Heaven. Keritot six.
Corn
So you can't quietly leave out the one that smells bad.
Herman
You cannot.
Corn
Alright. We have the recipe. But a recipe is not a practice. How was this actually made, and why did it stop?
Herman
Start with the processing, because it's more physical than people expect. The onycha was scrubbed with Kersannah lye, and the reason given is so that it should be pleasant. Then soaked in Cyprus wine, so that it should be strong.
Corn
Lye and wine.
Herman
And the Talmud notes that urine would actually work better for that step, but it's banned from the Temple on grounds of propriety. Kavod ha-mikdash. The dignity of the place.
Corn
They knew the better solvent and refused to use it.
Herman
They knew and refused.
Corn
That's a very specific kind of institution.
Herman
Then the compounding itself. The ingredients were re-pounded twice a year in a large movable mortar. In summer they were spread out, to stop mold. In winter they were heaped in a pile, to keep the pungency in.
Corn
Seasonal handling. That's a working kitchen, not a ceremony.
Herman
And the workers chanted while they pounded. Pound it thoroughly, thoroughly pound it.
Corn
That's the line.
Herman
Over and over, in time with the pestle.
Corn
And honey was forbidden.
Herman
Forbidden. Adding it disqualified the whole batch. Leviticus two, verse eleven, no honey in an offering made by fire.
Corn
So you have a recipe with a hard exclusion, a capital penalty for omission, a banned solvent that would work better, and a chant. This is a trade.
Herman
It's a trade with a security clearance.
Corn
Which brings us to the Avtinas family.
Herman
The priestly clan that compounded the incense in the Second Temple. They kept the technique and the exact proportions secret. And the rabbis went after them for it. Mishnah Yoma, chapter three. The craftsmen of the House of Avtinas did not want to teach the secret of the preparation of the incense, and about these who were concerned only for themselves it is stated, the name of the wicked shall rot. Proverbs ten, verse seven.
Corn
That's a hard line to have preserved about you.
Herman
It's a curse in the Mishnah.
Corn
What was their defense?
Herman
Yoma thirty-eight a. They said the members of our father's house knew that this house, the Temple, is destined to be destroyed, and they were concerned lest an unworthy man learn our skill and go and engage in idol worship with it.
Corn
So they're either hoarders or they're protecting the formula from being repurposed.
Herman
Both readings are in the record. The rabbis call it selfishness. The family calls it safeguarding.
Corn
And the rabbis weren't satisfied, because they tried to crack it themselves.
Herman
They did. They brought in Greek scientists from Alexandria to reverse-engineer the formula. And the account says they identified everything except the ma'aleh ashan.
Corn
Everything.
Herman
Everything but the smoke-raiser.
Corn
So the most advanced scientific minds available got the whole ingredient list and still failed.
Herman
On one pinch.
Corn
What was the ma'aleh ashan?
Herman
A plant that made the smoke go straight up. A vertical column instead of a drifting cloud. That was the Avtinas secret, and it was lost when the Temple was destroyed in seventy.
Corn
And today?
Herman
Today there is only speculation as to what the herb was. Rabbi Steinsaltz suggested the Indian khimp plant, Leptadenia pyrotechnica. That's a suggestion, not a finding.
Corn
So the formula is not lost. The formula is written down. The smoke-raiser is lost.
Herman
That's exactly the distinction. Anyone can read Keritot six and reconstruct the eleven spices and the weights. What nobody can reconstruct is the thing that made the smoke behave.
Corn
And the scent, reportedly, carried.
Herman
Maimonides quotes the saying, in Jericho they could smell the incense. Jericho is a long way from the Temple. And the oral teaching puts it as far as the mountains of Machaerus, across the Jordan.
Corn
A city smelling another city's offering.
Herman
That's the claim.
Corn
Now the last question, and it's the one I find most interesting. Why does incense feel foreign to us?
Herman
Because we don't burn it. Rabbinic Judaism does not burn incense in synagogue. Full stop.
Corn
But it used to.
Herman
It used to. There was a custom of burning incense in synagogues in commemoration of the Temple. It shows up in communities in the Land of Israel, in Yemen, in the Eastern countries, in Europe. And it came to an end, probably in the Middle Ages. The latest testimony anyone has is from the twelfth century.
Corn
So somewhere between the Temple and now, it just stopped.
Herman
It stopped, and there's a plausible reason, and the reason is an argument.
Corn
The Karaites.
Herman
The Karaites objected fiercely. Not just to incense, to candles too. Their position was that these acts belong exclusively to the Temple, and performing them anywhere else is idolatry. Daniel Alqumsi in the tenth century, Judah Hadassi in the twelfth, both attacked the Rabbinic practice directly.
Corn
What did Hadassi say?
Herman
That the place is not sacred, and the rites are not sacred, and the person making the sacrifice is foreign and not sacred.
Corn
That's not a disagreement about furniture. That's a claim that the whole synagogue is illegitimate as a venue.
Herman
And the scholarship suggests the Rabbinic custom may have been discontinued partly because of that criticism. Not doctrine. Pressure.
Corn
So modern Jewish incense-lessness might be the residue of a medieval sectarian fight.
Herman
That's the reading in the Shemesh paper. It's a historical accident, not a theological verdict.
Corn
Then what replaced it?
Herman
Recitation. From the Geonic period, the Pitum HaKetoret baraita, the passage describing how the incense was made, starts being recited as liturgy instead of the incense being burned. Rav Amram Gaon, who headed the Sura Yeshiva in the ninth century, records it being said morning and evening in commemoration of the Temple incense.
Corn
They read the recipe instead of making it.
Herman
And the Zohar, second volume, two hundred and eighteen b, says reading the incense verses substitutes for the Temple Ketoret and wards off illness. That's why the passage sits at the front of so many siddurim.
Corn
So the thing itself became text.
Herman
Became text.
Corn
And the Samaritans?
Herman
The Samaritans still burn it. Every Sabbath eve and on festivals, in their synagogues, in a vessel called a Mabkhara. A Samaritan priest walks among the congregation with it, to atone for them.
Corn
So there's a living community doing the physical act, and it isn't us.
Herman
It isn't us. And I'll give you the line that captures the modern experience. A writer in twenty twenty-five put it this way. I cannot recall ever smelling incense burning in shul. In my mind, such practices seemed to belong categorically to Roman Catholic or Orthodox churches, or to Buddhist shrines.
Corn
That's the whole problem in three sentences.
Herman
Rabbi Andrea Zanardo adds the sensory point. Temple candles were unscented and visual. Incense was about smell. And smell is the sense contemporary Jewish worship basically doesn't use.
Corn
We kept the visual, we dropped the olfactory.
Herman
We kept the visual and we read the recipe aloud.
Corn
One more thing before we move on. There's a popular reading that the incense was psychoactive. That the High Priest was having visions because of the chemistry.
Herman
That comes from a single popular source, Mayim Achronim, and it's presented there as speculation. The argument is that a lot of the ingredients are antimicrobial or sedative or psychoactive, frankincense, myrrh, saffron, cinnamon, spikenard, costus. That Cyprus wine jugs found in Israel had traces of opium. That acacia wood, which supplied the coals, is high in DMT.
Corn
And the article itself says what about it?
Herman
The article itself notes that no major rabbinic sources say so. That's an academic hypothesis, and it's an interesting one, but it is not consensus and it shouldn't be repeated as fact.
Corn
Noted. It's a hypothesis.

Hilbert: Three hundred and sixty-eight maneh is the annual batch. The handfuls on Yom Kippur came out of the three extra, not the three sixty-five.
Corn
Right. That's what we said.

Hilbert: You said it, I just wanted it on the record that the daily portion was fixed. Nobody dipped into the daily portion for Yom Kippur. The three maneh sat separate all year.
Herman
Which is a scheduling problem, actually. You've got a batch that has to last exactly twelve months, and you're holding three maneh in reserve the entire time.

Hilbert: It's not a problem if you grind it right. They re-pounded the whole thing twice a year, and the Yom Kippur portion went back into the mortar the day before and got ground harder than the rest. Finer grind, more surface, burns hotter. That's the whole reason the smoke went up the way it did inside the room.
Corn
You think the grind mattered more than the ma'aleh ashan?

Hilbert: I think the grind was the part they could control. The ma'aleh ashan was one pinch of something nobody can name. You don't build a service around one pinch. You build it around the thing you do every day.
Herman
That's a real point. The chant, the pounding, the twice-yearly schedule. That's process control.

Hilbert: The chant wasn't decoration. Pound it thoroughly, thoroughly pound it. That's a metronome. You've got men around a mortar and if they drift out of time the batch separates, the heavy resins sink and the light stuff floats and you get an uneven grind. The chant keeps the pestle on beat so the whole thing stays uniform.
Corn
So it's a work song.

Hilbert: It's a work song the way a work song always is. It's a clock.
Herman
I'd never thought of it as load-balancing.

Hilbert: I made a batch once. Small one. Not for anything, I just wanted to know what it smelled like.
Corn
How small?

Hilbert: Small enough to fit in a coffee tin. I got most of it, or what I could get. The galbanum ruined it. I used too much and the whole thing smelled like a tire fire. Couldn't get it out of the kitchen for a week.
Corn
The one that stinks.

Hilbert: Rashi says it stands for the sinners. I stood in my kitchen and thought, well, that tracks. You put in too much of the bad-smelling one and it takes over everything. You leave it out entirely and it isn't the thing anymore.
Herman
Which is the whole teaching.

Hilbert: That's the whole teaching. And here's what I keep thinking about. Nobody alive has smelled it. Every description we have is secondhand, and the one ingredient that made the smoke stand up straight is gone, and the men who knew it died with the building.
Corn
So the recipe survived and the smell didn't.

Hilbert: The recipe survived and the smell didn't.
Corn
So the formula survives as text, but the smell is gone. What does that leave us with?
Herman
A recipe you can read and can't cook. That's what the Pitum HaKetoret is. It's recited morning and evening in a lot of siddurim, and what's actually happening in that moment is that a physical, sensory ritual got converted into a text.
Corn
And it's not a small substitution. Incense is the one offering that's entirely about the sense of smell. No one eats it, no one sees it, it's smoke. You can't photograph it.
Herman
Zanardo's point exactly. The candles were visual and unscented. The incense was the smell, and smell is the sense we dropped.
Corn
Here's what I keep coming back to. The most prestigious service in the Temple is the one with no living analogue. Not because anyone decided it was wrong. Because of a polemic in the Middle Ages and a preservation instinct that turned a recipe into a prayer.
Herman
And the open question is the smoke-raiser. Cassia is unidentified. Maimonides couldn't place it. The ma'aleh ashan is unknown, full stop. Speculation only. So we have the whole list and one blank space, and the blank space is the one that made it work.
Corn
Which makes you wonder what else in Jewish practice is a text standing in for a physical act nobody performs anymore. How much of what we do is a recitation of something that used to be done with your hands.
Herman
That's a bigger question than one episode.
Corn
It is. If you want to keep sending us questions like this one, leave us a review wherever you're listening. It helps people find the show.
Herman
And thanks to Hilbert Flumingtop, our producer.
Corn
This has been My Weird Prompts.
Herman
We'll be back soon.

This episode was generated with AI assistance. Hosts Herman and Corn are AI personalities.