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Potato Yeast Without Flour

A yeast starter made from potatoes, sugar, salt, ginger, and hops, used for bread.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 7 ingredients
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Why it works: Ginger and potato work together. They rank in the top 12% of all ingredient pairs, and cooks put them together in 992 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓

Potato Yeast Without Flour

Ingredients

Directions

Prepare

  1. Soak the yeast cakes in 4 tablespoons of tepid water.

  2. Boil the potatoes in 3 quarts of water, then pass them through a colander with the water.

  3. Boil the hops in 1 quart of water for 10 minutes, then strain the water over the potatoes.

Make the starter

  1. Add the sugar, salt, and ginger to the potato mixture.

  2. Ensure the total volume is 5 quarts; add tepid water if needed.

  3. When lukewarm, stir in the yeast mixture until smooth.

  4. Keep in a warm place until bubbles form on the surface.

Store

  1. Store in a stone crock, covered, and stir from the bottom before use.

  2. It can be kept in a dry, cool place for months.

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. Ginger + potatotop 12% of all pairs
    Smell alikemoderate
    Cooked together992 recipes

    Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).

  2. Sugar + gingertop 17% of all pairs
    Smell alikelow
    Cooked together14,054 recipes

    Shared aroma: 1-penten-3-one (fish, pungent).

  3. Ginger + hopstop 24% of all pairs
    Smell alikelow
    Cooked together3 recipes

    Shared aroma: eucalyptol (eucalyptus, herbal).

  4. Sugar + potatotop 30% of all pairs
    Smell alikelow
    Cooked together3,032 recipes

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

  5. Potato + hopstop 39% of all pairs
    Smell alikelow
    Cooked together3 recipes

    Shared aroma: myrcene (balsamic, herbaceous).

Sugar and ginger barely smell alike, yet cooks put them together in 14,054 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

Yeast cakes
Provide the living yeast that ferments the sugars and makes the starter bubble and rise.
Potatoes
Supply starch and body, giving the starter a thick, mashed base for the yeast to work in.
Sugar
Feeds the yeast, fuelling fermentation and the bubbles that form on the surface.
Hops
Add bitterness and aroma, and help preserve the starter against spoilage.

The step that matters

When lukewarm, stir in the yeast mixture. Yeast is killed by high heat, so the potato mixture must be lukewarm, not hot, before the yeast goes in. Too hot and the starter will not ferment.

Swap the potato

How well each one fits the dish's main ingredients (sugar, ginger, hops):

  1. Mustardfits better
  2. Capsicumfits better
  3. Sweet potatofits better
  4. Potatothe original

Fit is the average pairing score against sugar, ginger, hops. Candidates are from the same food group and used in at least 100 recipes.

“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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