Why it works: Lemon and orange match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 10,634 recipes. Both carry 3-hexenal, which smells apple, fruity. The science ↓
Fruit Cake
Ingredients
Directions
The book says “a slow oven”. The 300°F (150°C) in the steps is the modern equivalent, not the book's own figure.
Prepare
Preheat the oven to 300°F (150°C).
Slice the citron and orange peel.
Make the batter
Cream the butter and sugar together.
Add the spices and molasses, then mix in the beaten yolks of the eggs.
Stir in part of the flour and the stiffly beaten egg whites.
Fold in the floured fruit and nuts.
Bake
Pour the batter into a prepared pan and bake for about 1 hour and 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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Lemon + orangetop 1% of all pairsSmell alikestrongCooked together10,634 recipes
Shared aroma: 3-hexenal (apple, fruity).
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Sugar + molassestop 11% of all pairsSmell alikemoderateCooked together9,225 recipes
Shared aroma: ethanol (alcoholic, ethereal).
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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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Brandy + orangetop 15% of all pairsSmell alikelowCooked together2,706 recipes
Shared aroma: beta-damascenone (apple, rose).
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
- Adds fat that keeps the cake tender and rich when creamed with sugar.
- Sugar
- Sweetens the batter and helps trap air when creamed with the butter.
- Eggs
- Yolks bind and enrich the batter, while whipped whites add lift and structure.
- Flour
- Forms the main structure that holds the cake together as it bakes.
- Dark molasses
- Adds moisture, sweetness and deep color and flavor to the cake.
- Baking soda
- Reacts with the acidity of molasses to produce gas that helps the cake rise.
The step that matters
Folding in the stiffly beaten egg whites. Whipped whites hold the air that lifts the cake. Stirring them in roughly or overmixing deflates the foam, so the cake bakes up dense. Fold gently and only until just combined.
Swap the orange
How well each one fits the dish's main ingredients (butter, sugar, molasses, flour, egg, brandy, lemon):
- Raisinfits better
- Vanillafits better
- Figfits about as well
- Orangethe original
Fit is the average pairing score against butter, sugar, molasses, flour, egg, brandy, lemon. 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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