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 ↓
Jessica Sauce
Ingredients
Directions
Make the custard
Scald 1 cup milk, stir in the beaten yolk of 1 egg mixed with 1 cup powdered sugar; cook and stir for 3 minutes.
When cold, stir in the juice and grated yellow rind of 1 lemon, and, when ready to serve, the stiff whites of 2 eggs.
Make the sauce
Beat 1 cup sugar and 1 cup butter to a cream.
Add the well beaten yolks of 2 eggs, the juice of 1 lemon, and gradually 1 pint of boiling water.
Lastly add the whites of egg beaten stiff.
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. See the original page.
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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Milk + eggtop 18% of all pairsSmell alikemoderateCooked together88,785 recipes
Shared aroma: 2-nonenal (fatty, green).
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Sugar + milktop 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
- Eggs
- Yolks thicken the mixture as they heat, and beaten whites add lightness.
- Lemon
- Juice adds sharp acidity and the grated rind adds fragrant aroma.
- Sugar
- Adds sweetness that balances the acidity of the lemon.
- Butter (in the method)
- Adds fat for richness and a smooth, creamy texture.
- Milk
- Forms the liquid base that the egg yolks thicken.
The step that matters
Cook the milk and egg yolk mixture while stirring. Egg yolks thicken as they heat, but they can scramble and turn lumpy if the heat is too high or the mixture is left unstirred. Stirring keeps the custard smooth.
Flavor stand-ins for the lemon
How well each one fits the dish's main ingredients (sugar, milk, egg):
- Vanillabetter flavor fit
- Figabout as good a flavor fit
- Raisinabout as good a flavor fit
- Lemonthe original
Fit is the average pairing score against sugar, milk, egg. Candidates are from the same food group and used in at least 100 recipes. This compares flavor only: it does not check the job the ingredient does in the dish (bulk, moisture, acidity, structure).
“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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