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Good Yeast

A yeast starter made by boiling potatoes, adding sugar, salt, water, and old yeast, then letting it rise overnight.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 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 ↓

Good Yeast

Ingredients

Directions

Prepare the potatoes

  1. Boil the potatoes until tender.

  2. Mash or sift the potatoes until fine.

Make the starter

  1. Add sugar, coarse sea salt, boiling water, cold water, and old yeast to the potatoes.

  2. Cover the mixture tightly and let it rise overnight.

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
Supply starch that the yeast ferments, and body that thickens the starter.
Old yeast
Provides the live culture that ferments the sugars and starch and makes the starter rise.
Sugar
Gives the yeast an easily used food source, speeding fermentation and adding mild sweetness.

The step that matters

Mash or sift the potatoes until fine. Lumps leave pockets of unbroken starch the yeast cannot easily reach. A smooth mash disperses starch evenly, giving the yeast a uniform food source during the overnight rise.

“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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