Why it works: Milk and vanilla are a kitchen classic. They rank in the top 5% of all ingredient pairs, and cooks put them together in 19,187 recipes. Both carry ethyl caproate, which smells fruity, apple peel. The science ↓
Citron Cake
Ingredients
Directions
The book says “a moderate oven”. The 350°F in the steps is the modern equivalent, not the book's own figure.
Make the batter
Sift the baking powder through the flour.
Cream together the butter and sugar.
Add the well-beaten yolks of the eggs, flavoring, and milk.
Beat thoroughly, adding a third of the flour.
Beat the egg whites until stiff and fold part into the mixture.
Add the rest of the flour, then fold in the remaining egg whites.
Add the floured citron and divide into two cakes.
Bake and finish
Bake in well-greased paper-lined tins in a moderate oven (350°F/175°C).
Frost the cakes when cool.
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.
Photo for illustrative purposes only · Contact us to use it
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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Milk + vanillatop 5% of all pairsSmell alikemoderateCooked together19,187 recipes
Shared aroma: ethyl caproate (fruity, apple peel).
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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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Sugar + vanillatop 8% of all pairsSmell alikelowCooked together35,032 recipes
Shared aroma: beta-damascenone (apple, rose).
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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Vanilla + flourtop 12% of all pairsSmell alikemoderateCooked together19,241 recipes
Shared aroma: isobutyraldehyde (malty, green).
Sugar and vanilla barely smell alike, yet cooks put them together in 35,032 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
- Whites trapped by beating give lift and a light, airy crumb; yolks add richness and structure.
- Butter
- Creamed with sugar, it traps air and adds fat for a tender texture.
- Flour
- Forms the structure that holds the cake's shape as it bakes.
- Baking powder
- Releases gas in the batter, helping the cake rise.
- Granulated sugar
- Sweetens the cake and helps create a fine, tender crumb when creamed with butter.
- Sliced citron
- Adds candied fruit flavour and chewy pieces throughout the cake.
The step that matters
Folding in the egg whites. Stiff whites hold the air that lifts the batter. Folding gently, rather than stirring, keeps that air in, so the cake rises well and stays light.
Swap the vanilla
How well each one fits the dish's main ingredients (sugar, butter, milk, egg, flour):
- Vanillathe original
- Raisinfits about as well
- Figfits less well
- Coconutfits less well
Fit is the average pairing score against sugar, butter, milk, egg, 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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