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Potato Yeast

A yeast mixture made from mashed potatoes, hops, sugar, ginger, salt, and yeast foam, used for bread.

From an old cookbook · modernised transcription
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Potato Yeast

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

Ingredients

Directions

Prepare

  1. Peel 1 dozen good potatoes, cover with water and boil until done. Mash in the pot.

  2. Cover 2 handfuls hops with water and boil until the strength is extracted — about 1 hour. Strain into the potatoes.

Ferment and store

  1. Add 1 cup sugar, 1 tablespoon each of ginger and salt, and 2 cakes yeast foam.

  2. Let rise all out 24 hours, until bottles not too full and cork loosely.

  3. It will keep several weeks.

Nutrition, whole recipe (rough)

667Calories
17 gProtein
1 gFat
145 gCarbs

Counts 5 of 7 ingredients. The other 2 aren't in our nutrition table and add nothing above, so the real totals are higher.

What these numbers assume: 5 portions
IngredientPortion assumedkcal
Flour1 cup (125g) all-purpose455
Potato1 medium (173g) baked161
Sugar1 tbsp (12.5g) granulated49
Ginger1 tsp grated fresh (2g)2
Salt1 tsp (6g)0
Hopnot in our table0
Cakenot in our table0

One typical portion per ingredient; the recipe's quantities are not counted. A rough guide only, not for medical or dietary planning.

By Martin, Maria Ewing, Mrs., [from old catalog] comp. 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. See the original page.

Photo for illustrative purposes only · Contact us to use it

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. Hops + gingertop 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. Hops + potatotop 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 foam
Ferments the sugars, producing gas that makes the liquid rise and turn lively.
Potatoes
Supply starch and body to the liquid, giving the brew a thicker, fuller texture.
Sugar
Provides food for the yeast, driving fermentation and building alcohol and carbonation.
Hops
Add bitterness and aromatic character that balances the sweetness of the brew.

The step that matters

Let rise all out 24 hours, until bottles not too full and cork loosely. Fermentation produces carbon dioxide, which builds pressure in sealed bottles. Leaving room in the bottle and corking loosely lets gas escape so the bottles do not burst.

Swap the potato

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

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

Fit is the average pairing score against hops, sugar, ginger. 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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