Why it works: Milk and lemon are a kitchen classic. They rank in the top 15% of all ingredient pairs, and cooks put them together in 19,053 recipes. Both carry 2-nonenal, which smells fatty, green. The science ↓
Snowball Custard
Ingredients
Directions
Make the islands
Beat the egg whites until stiff.
Sweeten the milk and bring it to a boil.
Drop spoonfuls of the beaten egg whites into the boiling milk.
Turn the whites as they rise until fully cooked, then place them in a glass dish.
Make the custard and serve
In the same milk, stir in the beaten yolks and sugar until it thickens.
Remove from heat and flavor with lemon or vanilla.
Pour the custard around the egg white balls in the glass dish.
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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Milk + lemontop 15% of all pairsSmell alikemoderateCooked together19,053 recipes
Shared aroma: 2-nonenal (fatty, green).
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Sugar + lemontop 18% of all pairsSmell alikelowCooked together53,532 recipes
Shared aroma: 2-nonenal (fatty, green).
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Egg + milktop 18% of all pairsSmell alikemoderateCooked together88,785 recipes
Shared aroma: 2-nonenal (fatty, green).
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Milk + sugartop 18% of all pairsSmell alikelowCooked together77,875 recipes
Shared aroma: 2-nonenal (fatty, green).
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Egg + lemontop 19% of all pairsSmell alikelowCooked together44,316 recipes
Shared aroma: (e,e)-2,4-decadienal (fatty, deep fried).
Sugar and lemon barely smell alike, yet cooks put them together in 53,532 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
- Egg whites
- Beaten into a stiff foam that cooks into light, airy floating puffs.
- Milk
- Poaches the egg white puffs and becomes the base of the custard.
- Sugar
- Sweetens the milk and custard.
- Lemon or vanilla extract
- Adds aroma and flavor to the finished custard.
The step that matters
Turn the whites as they rise until fully cooked. Egg whites cook quickly in simmering milk, but if they are not turned they can cook unevenly and stay raw or wet on one side. Turning them lets every side set so each puff holds its shape.
Swap the lemon
How well each one fits the dish's main ingredients (egg, milk, sugar):
- Vanillafits better
- Figfits about as well
- Raisinfits about as well
- Lemonthe original
Fit is the average pairing score against egg, milk, sugar. 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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