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 gives no oven temperature. The 350°F (175°C) in the steps was added when the recipe was transcribed, as a starting point.
Make the batter
Cream together the sugar and butter.
Add the sweet milk and mix well.
Beat the egg whites and yolks separately, then combine them into the mixture.
Stir in the vanilla or lemon extract.
Sift the baking powder with the flour and fold it into the batter.
Gently fold in the sliced citron.
Bake
Divide the batter into two cake pans lined with buttered parchment paper.
Bake at 350°F (175°C) until a toothpick comes out clean.
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
- Whipped separately and folded in, they give the cake its light, airy structure.
- Butter
- Creamed with sugar, it traps air and adds richness and a tender crumb.
- Flour
- Its proteins set during baking, forming the cake's main structure.
- Baking powder
- Releases gas in the batter, helping the cake rise and become light.
- White sugar
- Creamed with butter, it adds sweetness and helps create a tender texture.
- Citron
- Sliced and floured, it adds tart, aromatic fruit flavor and chewy pieces throughout the cake.
The step that matters
Fold in the citron gently. Folding keeps the air trapped in the whipped egg whites and creamed batter intact. Overmixing deflates the batter and makes the cake dense, while flouring the citron helps keep the pieces from sinking to the bottom.
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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