Why it works: Butter and milk are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 81,283 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓
Cookies, Gingerbread and Snaps
Ingredients
Directions
The book says “a hot oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.
Make the dough
In a bowl, cream the butter and sugar together.
Add the salt, ginger, and beaten egg.
Dissolve the baking soda in the water and stir it into the sour milk.
Add the milk mixture to the bowl and mix well.
Gradually beat in the flour until combined.
Shape and bake
Divide the dough in half and roll out to ½ inch thick.
Cut into squares and bake for about 8 minutes at 400°F (200°C).
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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Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Flour + buttertop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Flour + milktop 14% of all pairsSmell alikelowCooked together78,219 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Flour + sugartop 15% of all pairsSmell alikemoderateCooked together92,116 recipes
Shared aroma: phenylacetaldehyde (hawthorne, honey).
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Ginger + flourtop 15% of all pairsSmell alikemoderateCooked together8,564 recipes
Shared aroma: isobutyraldehyde (malty, green).
Flour and butter barely smell alike, yet cooks put them together in 124,287 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
- Butter
- Creams with sugar to give the dough richness and a tender texture.
- Sugar
- Sweetens the cookies and helps create a tender crumb when creamed with butter.
- Egg
- Binds the dough and adds structure as the cookies set.
- Baking soda
- Reacts with the sour milk to produce gas that lifts the cookies.
- Sour milk
- Provides acidity that activates the baking soda and adds moisture.
- Flour
- Forms the main structure of the dough once its proteins are hydrated.
The step that matters
Dissolve the baking soda and combine it with the sour milk before adding. Baking soda needs an acid, such as the sour milk, to react and release gas. Mixing it in properly gives an even rise and avoids pockets of soda that taste bitter.
Swap the ginger
How well each one fits the dish's main ingredients (flour, butter, sugar, egg, milk):
- Cinnamonfits better
- Nutmegfits better
- Jalapenofits better
- Gingerthe original
Fit is the average pairing score against flour, butter, sugar, egg, milk. 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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