Why it works: Sugar and lemon are a kitchen classic. They rank in the top 18% of all ingredient pairs, and cooks put them together in 53,532 recipes. Both carry 2-nonenal, which smells fatty, green. The science ↓
Lemon Filling Foe Taets, Cakes, Etc
Ingredients
Directions
Mix the base
Beat the sugar and egg together until creamy.
Add the grated lemon rind, lemon juice, and cornstarch, and blend thoroughly.
Slowly pour in the boiling water while stirring.
Cook the filling
Place the mixture in a double saucepan and simmer for 10 minutes.
The filling is now ready for use.
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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Sugar + lemontop 18% of all pairsSmell alikelowCooked together53,532 recipes
Shared aroma: 2-nonenal (fatty, green).
-
Egg + lemontop 19% of all pairsSmell alikelowCooked together44,316 recipes
Shared aroma: (e,e)-2,4-decadienal (fatty, deep fried).
-
Sugar + eggtop 21% of all pairsSmell alikemoderateCooked together122,807 recipes
Shared aroma: 2-nonenal (fatty, green).
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
- Sugar
- Sweetens the filling and helps soften the egg into a smooth base.
- Egg
- Adds richness and helps the filling set as it cooks.
- Lemon juice
- Adds sharp acidity that balances the sweetness.
- Grated lemon rind
- Adds concentrated lemon aroma and flavour from the peel.
- Cornstarch
- Thickens the liquid as it heats, giving the filling body.
The step that matters
Slowly pour in the boiling water while stirring. Cornstarch clumps when it meets hot liquid all at once. Adding the water slowly while stirring disperses the starch evenly, so the filling cooks up smooth and thickens without lumps.
Swap the lemon
How well each one fits the dish's main ingredients (sugar, egg):
- Vanillafits better
- Raisinfits about as well
- Lemonthe original
- Datesfits less well
Fit is the average pairing score against sugar, egg. 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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