Why it works: Butter and flour 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 ↓
Pineapple Upside Down Cake
Ingredients
Directions
Make the topping
Melt the butter in a frying pan.
Spread the brown sugar over the melted butter.
Spread the crushed pineapple over the brown sugar.
Make the batter
Beat the egg yolks in a bowl.
Add the white sugar and pineapple juice to the yolks.
Mix in the flour, baking powder, and salt.
Fold in the stiffly beaten egg whites.
Bake
Pour the batter into the pan over the pineapple.
Bake at 350°F (175°C) for 35 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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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 + pineappletop 17% of all pairsSmell alikemoderateCooked together1,134 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
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Butter + eggtop 17% of all pairsSmell alikemoderateCooked together118,967 recipes
Shared aroma: decanal (soap, orange peel).
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
- Eggs
- Whipped whites and yolks give the cake its light, airy structure.
- Butter
- Melted butter coats the pan and adds richness and flavor to the topping.
- Brown sugar
- Melts into a caramel layer that sweetens and flavors the pineapple topping.
- Crushed pineapple
- Provides fruit, moisture, and the visible topping that becomes the cake's surface.
- Flour
- Forms the cake's main structure once set by heat.
- Baking powder
- Releases gas during baking so the batter rises and becomes tender.
The step that matters
Fold in the stiffly beaten egg whites. Egg whites hold air that gives the cake its lift. Folding gently, rather than stirring, keeps the air from deflating so the cake bakes up light.
Swap the pineapple
How well each one fits the dish's main ingredients (butter, egg, sugar, flour):
- Raisinfits better
- Vanillafits better
- Figfits better
- Pineapplethe original
Fit is the average pairing score against butter, egg, sugar, 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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