Why it works: Cream and sugar are a kitchen classic. They rank in the top 9% of all ingredient pairs, and cooks put them together in 43,450 recipes. Both carry 2,3-butanedione, which smells butter, sweet. The science ↓
Custard Ice Cream
Ingredients
Directions
Make the custard
Sweeten the cream or milk with sugar and flavor to taste.
Heat the mixture in a double boiler until it begins to boil.
Mix cornstarch or rice flour with a little milk until smooth. Stir the mixture into the boiling mixture.
Boil for a few minutes.
Remove from heat.
Gradually stir in the beaten eggs until well combined.
Cool and freeze
Let the mixture cool completely.
Freeze it as ice cream.
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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Cream + sugartop 9% of all pairsSmell alikemoderateCooked together43,450 recipes
Shared aroma: 2,3-butanedione (butter, sweet).
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Sugar + eggtop 21% of all pairsSmell alikemoderateCooked together122,807 recipes
Shared aroma: 2-nonenal (fatty, green).
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Cream + ricetop 23% of all pairsSmell alikelowCooked together3,399 recipes
Shared aroma: 2-nonanone (fruity, floral).
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Cream + eggtop 24% of all pairsSmell alikelowCooked together42,166 recipes
Shared aroma: acetic acid (sour, vinegar).
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Sugar + ricetop 26% of all pairsSmell alikelowCooked together8,744 recipes
Shared aroma: 2-nonenal (fatty, green).
Cream and egg barely smell alike, yet cooks put them together in 42,166 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
- Cream or rich milk
- Provides fat and richness, giving the ice cream a smooth, creamy mouthfeel.
- Sugar
- Adds sweetness and lowers the freezing point, keeping the ice cream softer when frozen.
- Cornstarch or rice flour
- Thickens the custard base so it holds body and resists icy texture.
- Eggs
- Add structure and richness as they set gently, thickening the custard.
The step that matters
Gradually stir in the beaten eggs. Adding hot liquid to eggs too quickly, or overheating them, can scramble the eggs and leave lumps. Adding them gradually while stirring tempers them so the custard stays smooth and thickens evenly.
“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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