Why it works: Onion and carrot are a kitchen classic. They rank in the top 6% of all ingredient pairs, and cooks put them together in 21,601 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Aspic, or Clear Savoury-jelly
Ingredients
Directions
Make the stock
Boil calf's feet, veal, ham, onions, carrots, and herbs in water until reduced by more than half.
Strain the mixture.
Let it cool completely.
Remove all fat and sediment.
Clarify and season
Put the clear jelly into a clean saucepan.
Add beaten egg whites and stir until nearly boiling.
Simmer for 15 minutes.
Let it settle.
Pour through a jelly bag until clear.
When it begins to boil, add mace, peppercorns, and salt to taste.
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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Onion + carrottop 6% of all pairsSmell alikemoderateCooked together21,601 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Carrot + macetop 15% of all pairsSmell alikemoderateCooked together2,592 recipes
Shared aroma: myristicin (spice, warm).
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Veal + carrottop 15% of all pairsSmell alikelowCooked together3,015 recipes
Shared aroma: 2-nonenal (fatty, green).
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Veal + hamtop 15% of all pairsSmell alikelowCooked together3,264 recipes
Shared aroma: 2,4-decadienal (seaweed).
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Onion + macetop 17% of all pairsSmell alikelowCooked together7,078 recipes
Shared aroma: eugenol (clove, spicy).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Calf's feet
- Release gelatin that sets the cooled liquid into a firm jelly.
- Veal knuckle
- Adds body and meaty flavour to the stock, along with extra gelatin.
- Lean ham
- Contributes savoury, salty depth to the stock.
- Egg whites
- Coagulate and trap cloudy particles, so the stock clarifies when strained.
The step that matters
Adding the egg whites and simmering. Egg whites must be stirred in and brought to near boiling without vigorous boiling, so they rise and trap sediment. Boiling hard breaks up the raft and leaves the jelly cloudy.
Swap the mace
How well each one fits the dish's main ingredients (veal, ham, onion, carrot, egg):
- Parsleyfits better
- Celeryfits better
- Marjoramfits better
- Macethe original
Fit is the average pairing score against veal, ham, onion, carrot, 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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