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Home-made Yeast

A homemade yeast made by grating potatoes, boiling, adding sugar and salt, then yeast, and allowing it to rise.

From an old cookbook · modernised transcription
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Why it works: Potato and sugar are a kitchen classic. They rank in the top 30% of all ingredient pairs, and cooks put them together in 3,032 recipes. Both carry beta-damascenone, which smells apple, rose. The science ↓

Home-made Yeast

Ingredients

Directions

Cook the potatoes

  1. Grate the potatoes.

  2. Add boiling water to achieve a yeast-like consistency.

  3. Boil for 30 minutes.

Finish and store

  1. Once lukewarm, stir in the sugar and salt.

  2. Add the yeast and let it rise well.

  3. Transfer to a covered jar or bottle for storage.

Recipe from a historical cookbook (Internet Archive).

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.

  1. Potato + sugartop 30% of all pairs
    Smell alikelow
    Cooked together3,032 recipes

    Shared aroma: beta-damascenone (apple, rose).

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Potatoes
Provide starch and moisture that form the base the yeast works in.
Sugar
Feeds the yeast and adds sweetness.
Yeast
Ferments the mixture, producing gas that makes it rise.

The step that matters

Add the yeast only when the mixture is lukewarm. Yeast cells are damaged or killed by very hot liquid. Letting the boiled potato mixture cool to lukewarm before stirring in the yeast protects it, so the mixture can ferment and rise.

“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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