Why it works: Nutmeg and flour are a kitchen classic. They rank in the top 8% of all ingredient pairs, and cooks put them together in 18,623 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
Citron Cake
Ingredients
Directions
The book says “a moderate oven”. The 350°F (175°C) in the steps is the modern equivalent, not the book's own figure.
Make the batter
Cream the butter and sugar together until light and fluffy.
Beat in the eggs, four at a time.
Add the grated nutmeg, then the rosewater.
Mix in the flour and sliced citron until well combined.
Knead the mixture until smooth.
Bake
Pour into cake pans lined with buttered paper.
Bake in a moderate oven at 350°F (175°C) for three to four hours.
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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Nutmeg + flourtop 8% of all pairsSmell alikemoderateCooked together18,623 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Sugar + flourtop 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 + nutmegtop 16% of all pairsSmell alikemoderateCooked together24,377 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
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
- Butter
- Creams with the sugar to trap air and add richness and tender texture.
- Sugar
- Creams with the butter to aerate the batter and adds sweetness.
- Eggs
- Bind the batter and add structure and richness as the cake sets.
- Flour
- Provides the structure that holds the cake together as it bakes.
- Citron
- Adds candied fruit flavour and chewy pieces throughout the cake.
The step that matters
Beating in the eggs gradually. Adding eggs four at a time lets each addition emulsify fully into the creamed butter and sugar. Adding them all at once can cause the batter to curdle, which weakens the air structure and final texture.
Swap the nutmeg
How well each one fits the dish's main ingredients (butter, sugar, egg, flour):
- Cinnamonfits about as well
- Nutmegthe original
- Jalapenofits less well
- Capersfits less well
Fit is the average pairing score against butter, sugar, 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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