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 ↓
Impeomptu Jelly 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.
Prepare the cake batter
Preheat your oven to 350°F (175°C).
Cream together the butter and 2 cups of sugar.
Add the yolks of the eggs and mix well.
Fold in the beaten egg whites and flour until combined.
Make the jelly
For the jelly, combine the grated apple, lemon rind, lemon juice, 1 cup of sugar, and 1 egg in a saucepan.
Boil the mixture, stirring constantly, until it jellies.
Cool the jelly before using.
Bake and assemble
Bake the cake in jelly-cake pans or in thin layers.
Spread the jelly between each layer as you assemble the cake.
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.
-
Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Apple + lemontop 14% of all pairsSmell alikemoderateCooked together7,551 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
-
Butter + appletop 14% of all pairsSmell alikemoderateCooked together8,706 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
-
Sugar + flourtop 15% of all pairsSmell alikemoderateCooked together92,116 recipes
Shared aroma: phenylacetaldehyde (hawthorne, honey).
-
Flour + eggtop 15% of all pairsSmell alikelowCooked together106,462 recipes
Shared aroma: isobutyraldehyde (malty, green).
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 sugar to trap air, giving the cake a tender, rich crumb.
- Eggs
- Yolks enrich and bind the batter; beaten whites add lift and structure.
- Flour
- Provides the structure that holds the thin cake layers together.
- Sugar
- Sweetens the cake and helps create a light, creamed texture.
- Grated apple
- Adds moisture and pectin that helps the filling thicken into a jelly.
- Lemon
- Its juice adds acidity and its rind adds aroma, brightening the filling.
The step that matters
Boil the jelly while stirring constantly. Eggs in the filling can curdle or scorch if overheated or left unstirred, and the mixture only sets properly once it reaches jelling temperature through the apple's pectin.
Swap the apple
How well each one fits the dish's main ingredients (butter, sugar, flour, egg, lemon):
- Raisinfits better
- Vanillafits better
- Figfits better
- Applethe original
Fit is the average pairing score against butter, sugar, flour, egg, 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.
More jelly cake recipes
You might also like
Apple Pudding256 recipes
Lemon Cake228 recipes
Lemon Ice147 recipes
Lemon Sherbet103 recipesThe free Flavor Lab newsletter: one surprising pairing a week and the molecular reason it works, in 60 seconds. No spam, unsubscribe anytime.
Prefer an account? Create a free account to save pairings and unlock the full chemistry.