Why it works: Potato and ginger 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 ↓
Home-made Yeast
Ingredients
Directions
Make the potato liquid
Boil the potatoes in water until thoroughly cooked.
Add the muslin bag of hops to the boiling potatoes.
Drain the water over enough flour to make a thin batter.
Scald the batter on the stove to cook the flour.
Remove from heat and let cool slightly.
Build the starter
Mash the potatoes and add them to the batter.
Stir in the sugar, ginger, salt, and yeast.
Let the mixture stand in a warm place until it rises.
Transfer to a large mouthed jug and cork tightly.
Store the jug in a cool place.
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.
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Potato + gingertop 12% of all pairsSmell alikemoderateCooked together992 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Flour + sugartop 15% of all pairsSmell alikemoderateCooked together92,116 recipes
Shared aroma: phenylacetaldehyde (hawthorne, honey).
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Potato + flourtop 15% of all pairsSmell alikemoderateCooked together5,355 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Flour + gingertop 15% of all pairsSmell alikemoderateCooked together8,564 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Sugar + gingertop 17% of all pairsSmell alikelowCooked together14,054 recipes
Shared aroma: 1-penten-3-one (fish, pungent).
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
- Potatoes
- Provide starch and body that feed the yeast and thicken the batter.
- Flour
- Forms the thin batter that gives the yeast a starchy base to ferment.
- Sugar
- Gives the yeast a quick food source to drive fermentation and rising.
- Yeast
- Ferments the sugars and starches, producing gas that makes the mixture rise.
- Hops
- Adds bitterness and aroma and helps preserve the starter.
The step that matters
Scald the batter on the stove to cook the flour. Heating the flour mixture cooks the starch so yeast can digest it; undercooked flour leaves raw taste and poor fermentation. Let it cool before adding yeast, since heat kills yeast cells.
Swap the potato
How well each one fits the dish's main ingredients (hops, flour, sugar, ginger):
- Mustardfits better
- Arrowrootfits better
- Parsnipfits better
- Potatothe original
Fit is the average pairing score against hops, flour, 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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