Why it works: Milk and butter 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 ↓
Common Custard
Ingredients
Directions
The book says “a quick oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.
Prepare the custard
Beat the eggs until light.
Stir the eggs into the milk.
Sweeten to taste and add the flavoring and salt.
Bake
Grease the bottom and sides of a baking dish with butter.
Pour the custard mixture into the dish.
Grate a little nutmeg over the top.
Bake in a 400°F (200°C) oven until set.
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.
-
Milk + buttertop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
-
Milk + peachtop 10% of all pairsSmell alikemoderateCooked together781 recipes
Shared aroma: phellandrene (minty).
-
Peach + nutmegtop 10% of all pairsSmell alikestrongCooked together342 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Peach + buttertop 14% of all pairsSmell alikemoderateCooked together860 recipes
Shared aroma: 2,6-nonadienal (cucumber, green).
-
Milk + nutmegtop 15% of all pairsSmell alikemoderateCooked together14,685 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Eggs
- Set the custard into a tender, sliceable structure as they cook.
- Milk
- Provides the liquid base that the eggs thicken and gives the custard its body.
- Sugar
- Adds sweetness and balances the flavor of the eggs and milk.
The step that matters
Bake in a 400°F (200°C) oven until set. Egg proteins coagulate as they heat, so removing the custard too late can leave it curdled or watery, while removing it too early leaves it runny. Watching for a set center prevents both problems.
Swap the nutmeg
How well each one fits the dish's main ingredients (egg, milk, sugar, peach, butter):
- Cinnamonfits better
- Nutmegthe original
- Gingerfits less well
- Clovefits less well
Fit is the average pairing score against egg, milk, sugar, peach, butter. 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 custard recipes
You might also like
The 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.

Peach Ice Cream64 recipes
Peach Fritters55 recipes
Peach Meringue40 recipes
Peach Ice16 recipes