Why it works: Butter and flour are a kitchen classic. They rank in the top 12% of all ingredient pairs, and cooks put them together in 124,287 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
Peanut Butter Cookies
Ingredients
Directions
Make the dough
Cream together the peanut butter and butter.
Gradually add the brown and white sugars, creaming well.
Add the beaten egg and mix thoroughly.
Sift together the flour and baking soda, then add to the mixture, beating well.
Shape and bake
Drop one level teaspoon of the mixture onto a cookie sheet.
Press down each cookie with a fork.
Bake for 10 minutes in a moderate oven at 350°F (175°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 + flourtop 12% of all pairsSmell alikelowCooked together124,287 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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Peanut + flourtop 15% of all pairsSmell alikemoderateCooked together1,427 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Egg + flourtop 15% of all pairsSmell alikelowCooked together106,462 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Peanut + buttertop 16% of all pairsSmell alikemoderateCooked together1,754 recipes
Shared aroma: trans-2-decenal (waxy, orange).
Butter and flour 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
- Peanut butter
- Provides fat and nutty flavor, and keeps the cookies tender and moist.
- Egg
- Binds the dough and adds structure as it sets in the oven.
- Cake flour
- Provides the structure that holds the cookies together as they bake.
- Baking soda
- Reacts to lift the dough and helps the cookies spread and brown.
- Brown sugar
- Adds moisture, caramel flavor and helps the cookies brown.
- White sugar
- Adds sweetness and helps the cookies spread and crisp at the edges.
The step that matters
Pressing each cookie with a fork. The dough is soft and has little flour structure, so pressing flattens it to an even thickness and helps it bake through without spreading unevenly.
Swap the peanut
How well each one fits the dish's main ingredients (butter, egg, flour, sugar):
- Almondfits better
- Macadamia nutfits better
- Chestnutfits better
- Peanutthe original
Fit is the average pairing score against butter, egg, flour, sugar. 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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