Why it works: Milk and sugar are a kitchen classic. They rank in the top 18% of all ingredient pairs, and cooks put them together in 77,875 recipes. Both carry 2-nonenal, which smells fatty, green. The science ↓
Koumiss
Ingredients
Directions
Prepare
Heat the milk and sugar over low heat until the sugar dissolves and the milk is lukewarm.
Dissolve the yeast in 2 tablespoons of the warm milk in a cup, then stir the dissolved yeast into the milk mixture.
Ferment and store
Pour the mixture into bottles, leaving some space at the top.
Leave the bottles uncorked for 24 hours to ferment.
Cork the bottles tightly and secure the corks with strong twine.
Store the bottles on their side in a cool place for 8 days before use.
Transcribed from a scanned cookbook and modernised for today's kitchens. Where the book gave no heat or time, or said "a moderate oven", the temperatures and times here may be modern equivalents rather than the book's own figures.
Explore the science
The flavor team
The pairs that carry this dish. Each one is judged two ways: how much their aromas overlap, and how often cooks already put them together.
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Milk + sugartop 18% of all pairsSmell alikelowCooked together77,875 recipes
Shared aroma: 2-nonenal (fatty, green).
Milk and sugar barely smell alike, yet cooks put them together in 77,875 recipes: they work on texture and structure more than aroma.
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Milk
- Provides the liquid base and the sugars that yeast ferments into carbonation and flavour.
- White granulated sugar
- Feeds the yeast, supplying the fermentable sugar that drives fermentation and adds sweetness.
- Compressed yeast
- Ferments the milk's sugars, producing carbon dioxide and alcohol that make the drink lively and tangy.
The step that matters
Cork the bottles tightly after the 24-hour open fermentation. Fermentation gives off carbon dioxide. If the bottles stay uncorked too long or the corks are loose, the gas escapes and the drink goes flat, while a tight seal lets pressure build and carbonation develop during storage.
“What each ingredient does” and “The step that matters” were written by Claude from this recipe’s own method and reviewed in samples by CompKitchen.
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