Why it works: Butter and milk are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 81,283 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓
Custard 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 cake
Preheat the oven to 350°F (175°C).
In a bowl, mix flour and baking powder.
Add sugar, eggs, melted butter, and milk to the bowl. Stir briskly for a few minutes.
Pour the batter into a jelly pan and bake until golden.
Make the custard
For the custard, bring 1 pint of milk to a boil.
In a separate bowl, mix 1 egg, ½ cup sugar, and ½ cup flour with a little cold milk until smooth. Stir the mixture into the boiling milk and cook until thickened.
Assemble
Once cool, spread the custard between layers of 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.
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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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Flour + buttertop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Flour + milktop 14% of all pairsSmell alikelowCooked together78,219 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Flour + sugartop 15% of all pairsSmell alikemoderateCooked together92,116 recipes
Shared aroma: phenylacetaldehyde (hawthorne, honey).
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Flour + eggtop 15% of all pairsSmell alikelowCooked together106,462 recipes
Shared aroma: isobutyraldehyde (malty, green).
Flour and butter 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
- All-purpose flour
- Forms the main structure of the cake crumb as it sets in the oven.
- Baking powder
- Releases gas in the batter, helping the cake rise and turn light.
- Eggs
- Add structure and richness, setting the crumb as they cook.
- Melted butter
- Adds fat for a tender texture and moist crumb.
- Sugar
- Sweetens the cake and helps it brown as it bakes.
- Milk
- Adds moisture to the batter and thickens the custard when heated with flour.
The step that matters
Cooking the custard until thickened. Flour and egg must be stirred smoothly into the boiling milk and cooked long enough for the starch to gelatinise. Undercooked custard stays thin and tastes floury, while stirring too little can leave lumps.
“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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