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Pure Potato Yeast

A yeast starter made from boiled potatoes, water, sugar, and yeast.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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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 ↓

Pure Potato Yeast

Ingredients

Directions

Prepare the potatoes

  1. Slice the potatoes.

  2. Boil them.

  3. Drain off all the water.

  4. Mash the potatoes through a colander.

Make the starter

  1. Add the boiling water.

  2. Stir in the cold water and sugar.

  3. When lukewarm, add the yeast.

  4. Leave it in a warm place for 2-3 hours until bubbles appear on the surface.

Store

  1. Transfer to a jug.

  2. Keep in a cold place, loosely corked, for the first 12 hours.

  3. Press the cork firmly in.

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 body, and the mashed starch gives the starter its thick texture.
Yeast
Ferments the sugar, producing the gas bubbles that make the starter rise and leaven bread.
White sugar
Feeds the yeast, giving it fuel for fermentation.

The step that matters

When lukewarm, add the yeast. Yeast is killed by very hot liquid, so the water must have cooled to lukewarm first. Adding it too early can stop fermentation before bubbles form.

“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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