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 ↓
Lemon Snaps
Ingredients
Directions
The book says “a quick oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.
Prepare
Preheat oven to 400°F (200°C).
Make the dough
Cream together sugar and butter in a bowl.
Add eggs and mix well.
Dissolve baking soda in hot water and add to mixture.
Flavor mixture with lemon.
Gradually add flour until dough is easy to roll.
Bake
Roll dough thin and cut into desired shapes.
Bake in preheated oven until lightly golden.
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).
-
Sugar + flourtop 15% of all pairsSmell alikemoderateCooked together92,116 recipes
Shared aroma: phenylacetaldehyde (hawthorne, honey).
-
Egg + flourtop 15% of all pairsSmell alikelowCooked together106,462 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Butter + lemontop 16% of all pairsSmell alikemoderateCooked together41,227 recipes
Shared aroma: 3-hexenal (apple, fruity).
-
Flour + lemontop 17% of all pairsSmell alikemoderateCooked together30,404 recipes
Shared aroma: isobutyraldehyde (malty, green).
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
- Eggs
- Bind the dough and add richness and structure as they set in the oven.
- Baking soda
- Reacts with the acidity in the mixture to help the cookies rise and spread and brown.
- Butter
- Adds fat for tenderness and flavor, and creams with sugar to trap air.
- Sugar
- Sweetens the dough and helps it brown and crisp as it bakes.
- Flour
- Provides the structure that holds the cookie shape once rolled and baked.
The step that matters
Dissolve baking soda in hot water and add to mixture.. Baking soda must be fully dissolved so it distributes evenly; clumps can leave bitter spots and uneven rising in the cookies.
Swap the lemon
How well each one fits the dish's main ingredients (sugar, egg, butter, flour):
- Raisinfits better
- Vanillafits better
- Figfits about as well
- Lemonthe original
Fit is the average pairing score against sugar, egg, butter, flour. 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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