Yoghurt and rice soup
Every yoghurt soup has the same single problem: splitting. The answer is not the flour and the egg but the way the temperature is raised.
This page says how to make it For what it is, where it comes from and the mechanism →
Soups · Central Anatolia · One pot · Budget · For guests
- Preparation
- 8 min
- Cooking
- 27 min
- Difficulty
- Practised hand
- Cost
- Very cheap
- Season
- All year
Yayla is the plainest member of Anatolia’s family of yoghurt soups; toyga, ayran aşı and tutmaç are the same principle worked with different grains in different places. Yoghurt splits when boiled because casein contracts under heat in an acid environment. The flour and the egg physically prevent that: the starch gel and the egg protein get between the casein particles and stop them sticking to each other.
Method
- Rinse the rice and soak it fifteen minutes: it cooks faster and gives its starch up more evenly.
- Whisk the yoghurt, flour and egg smooth in a wide bowl.
You will need: A pan · A whisk · A ladle
-
Put the rice in the pan with the water; once it boils, lower the heat and cook twenty minutes until completely soft.
Look for Take a grain and crush it between two fingers: there should be no resistance at all.
Why The rice has to be fully cooked before the liaison goes in, because after it the soup can never be boiled again — and that is the rice’s only chance.Starch gelatinised The granules soaked up water, swelled and burst into a network. It has thickened, and it will firm further as it cools. no way back
-
Whisk the yoghurt, flour and egg yolk until smooth and pourable.
Look for No lumps of flour should remain, and it should fall from the whisk in a smooth ribbon.
Why The flour’s starch gelatinises at 60 °C and holds the casein particles apart, while the lecithin in the yolk stabilises the emulsion. Together they let the yoghurt take heat.If it went wrong
If lumps remain, push it through a sieve. A lumpy liaison never disperses in the soup, and once it is in the pan it cannot be fixed.
A gluten web is forming Gliadin and glutenin hydrated into an elastic net. This is what will hold the gas. no way back
-
Ladle some of the boiling rice water into the yoghurt mixture slowly, whisking. Repeat with four or five ladles.
Look for The outside of the bowl should warm a little with each ladle. The mixture must stay smooth; if it starts looking grainy, stop and go slower.
Why This step is the whole of the liaison. Pouring yoghurt into boiling water is a 90 °C shock and the casein curdles instantly. Ladle by ladle, the yoghurt climbs from 20 °C to 70 °C gradually over a few minutes.If it went wrong
If it has begun to curdle, blitz it with a stick blender for twenty seconds: the particles break up mechanically and the soup comes back smooth. It saves the look rather than the texture, but the soup can go to the table.
A gluten web is forming Gliadin and glutenin hydrated into an elastic net. This is what will hold the gas. no way back
-
Pour the warmed mixture back into the pan, heat it stirring constantly and DO NOT BOIL — take it off at the first bubble. Salt it now.
Look for It should thicken and coat the back of the spoon. When one large bubble breaks the surface, take it off.
Why A liaison splits above 85 °C in spite of the flour and the egg. They make it harder, not impossible.If it went wrong
If it boiled and split, blend it. If that fails, pour plenty of minted butter over it and call it toyga — a split yoghurt soup has a name too.
Starch gelatinised The granules soaked up water, swelled and burst into a network. It has thickened, and it will firm further as it cools. no way back
A gluten web is forming Gliadin and glutenin hydrated into an elastic net. This is what will hold the gas. no way back
The egg is setting Proteins unfold and link up, binding everything together. This is where creaminess comes from. no way back
Salt · 0.37% Low. Everything reads flat and nothing steps forward.
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Melt the butter in a small pan, swirl the mint in it for ten seconds and pour it over the soup.
Look for The mint should darken without blackening — ten seconds is enough.
Why Menthol dissolves in fat rather than water: warmed in butter, the mint spreads its smell through the soup instead of sitting on top of it.Starch gelatinised The granules soaked up water, swelled and burst into a network. It has thickened, and it will firm further as it cools. no way back
A gluten web is forming Gliadin and glutenin hydrated into an elastic net. This is what will hold the gas. no way back
The egg is setting Too hot. The protein net over-tightened and pushed the water out: curdling and sponge. no way back
Salt · 0.36% Low. Everything reads flat and nothing steps forward.
Stay under 82 °C. Lower the heat or move to a bain-marie — a split custard never comes back.
If you want a crust, do not stay under 140 °C. Food cooks at this heat but never colours.
This recipe was run through the engine step by step — what goes in when, and at what temperature and for how long. The reactions above come from that run.
peak 130 °C · 31 minutes · engine 1.0.0 · confidence low
What can go wrong here
The yoghurt sauce curdled⌄
What happened
The yoghurt passed 85 °C. The casein micelles lost their charge, the protein clumped and released the water it was holding. Once split, it does not come back.
By the numbers
Stabilise 500 g of yoghurt with a tablespoon of starch and one yolk, stir in one direction, never boil.
Without a thermometer
Catch the threshold by eye: the moment a few large bubbles appear on the surface you are around 85 °C, take it off. The sauce is ready when it coats the back of a spoon — draw a line with your finger and the line should hold.
After the heat goes off
Hot, in a deep bowl, with the pool of minted butter on top. Bread beside it; no lemon, the soup is already sour.
Two days in the fridge. A yoghurt soup goes on souring and thickening as it stands.
On the lowest flame, stirring constantly, never past 70 °C. It splits more easily on a second heating than on the first, and in a microwave it certainly will.
Not for the freezer. Ice crystals tear the casein network apart mechanically, and it thaws definitively split.
Poured over boiled pasta and baked fifteen minutes, the leftovers become a yoghurt pasta bake.
Very suitable from twelve months: soft, not sour, no heat. For 12–36 months lift their share before the salt and serve the minted butter separately. For a baby under one the yolk must be fully cooked — the liaison reaches 70 °C, which is not quite enough, so hold their portion two minutes longer around 80 °C.
- Rice → Coarse bulgur Made with bulgur it is called toyga in some regions; bulgur cooks in fifteen minutes, so the first step shortens.
- Egg → Flour It works without egg: take the flour up to 30 g. The risk of splitting rises a little and the texture goes slightly more starchy.
- Terbiye — tempering a sauce The method this recipe rests on
- Yoghurt What it does in heat, water and acid
- Rice What it does in heat, water and acid
- Egg What it does in heat, water and acid
- Tutmaç soup Similar method, or something that sits on the same table
- Wedding soup Similar method, or something that sits on the same table
- Cold yoghurt soup Similar method, or something that sits on the same table
- One pot Other recipes that answer the same need
- Budget Other recipes that answer the same need
- For guests Other recipes that answer the same need
What it tastes like
No axis sits clearly above the average: a balanced recipe.
This profile is computed rather than measured: the role-weighted average of its ingredients’ taste vectors, shifted by what the cooking does. The thin line is the database average on that axis.
Closest in taste
Not hand-picked: ranked by distance across the eight taste axes.
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