Why it works: Flour and butter 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 ↓
Invalid Cake
Ingredients
Directions
The book says “a moderately hot oven”. The 350°F (175°C) in the steps is the modern equivalent, not the book's own figure.
Prepare
Weigh the egg and measure out equal weights of flour, caster sugar, and butter.
Make the batter
In a bowl, beat the butter and sugar together until creamy.
Beat the egg and stir it into the butter and sugar mixture.
Grate the lemon rind into the flour and gently fold it into the mixture.
Mix the baking powder with the last tablespoon of flour and add it to the batter.
Bake
Pour the mixture into well-buttered fancy molds.
Bake in a moderate oven at 350°F (175°C) for about 10 to 15 minutes.
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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Flour + buttertop 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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Egg + flourtop 15% of all pairsSmell alikelowCooked together106,462 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Butter + lemontop 16% of all pairsSmell alikemoderateCooked together41,227 recipes
Shared aroma: 3-hexenal (apple, fruity).
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Flour + lemontop 17% of all pairsSmell alikemoderateCooked together30,404 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
- Egg
- Binds the batter and adds structure and richness as it sets in the oven.
- Flour
- Provides the structure that holds the cake together as it bakes.
- Caster sugar
- Sweetens the cake and helps create a tender, creamy texture when beaten with butter.
- Butter
- Adds fat for richness and a tender crumb, and carries flavour through the batter.
- Baking powder
- Releases gas during baking so the cake rises and becomes lighter.
The step that matters
Fold in the flour and lemon rind gently. Overmixing after the flour is added develops gluten, which can make the cake tough and dense. Gentle folding keeps the batter light so it rises evenly.
Swap the lemon
How well each one fits the dish's main ingredients (egg, flour, sugar, butter):
- Raisinfits better
- Vanillafits better
- Figfits about as well
- Lemonthe original
Fit is the average pairing score against egg, flour, sugar, butter. 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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