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Dr. Hauler's Instructions for Making Potatoe Yeast

A fermented potato-based yeast mixture made with boiled potatoes, sugar, and common yeast.

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 ↓

Dr. Hauler's Instructions for Making Potatoe Yeast

Ingredients

Directions

Prepare the potatoes

  1. Boil the potatoes until thoroughly cooked.

  2. Skin and mash the potatoes until smooth.

  3. Add enough hot water to achieve the consistency of common yeast.

  4. Pass the mixture through a colander.

Ferment

  1. When just warm, stir in the brown sugar and common yeast.

  2. Keep the mixture warm until fermentation is complete, about 24 hours.

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

Mealy potatoes
Provide starch and body, with the mash giving the starter its thick, workable texture.
Brown sugar
Feeds the yeast, supplying the sugar it needs to ferment and produce gas.
Common yeast
Carries the fermentation that leavens the starter.

The step that matters

Stir in the yeast only when the mixture is just warm. Yeast is killed by high heat, so adding it to a mixture that is still hot can stop fermentation before it starts. Warm, not hot, lets the yeast feed on the sugar and grow.

“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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