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 ↓
Calves' Feet Jelly
Ingredients
Directions
Prepare
Soak the beef in cold water for 6 hours.
Split the calves' feet in half and blanch them in boiling water for 3 minutes.
Make the stock
Place the beef and calves' feet in a stewpan and cover with water.
Slowly boil for 5 hours, skimming regularly and ensuring the pot remains full of boiling water.
Strain the liquid through a muslin strainer into a large basin.
Set and finish
Cool the basin in a place with good air circulation.
The next day, skim off the fat from the surface of the jelly.
To absorb any remaining fat, place a piece of paper on top of the jelly.
For a sweet jelly, dissolve the sugar and add it with lemon juice and Madeira to the stock.
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.
-
Sugar + lemontop 18% of all pairsSmell alikelowCooked together53,532 recipes
Shared aroma: 2-nonenal (fatty, green).
-
Beef + lemontop 21% of all pairsSmell alikemoderateCooked together4,278 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
-
Beef + sugartop 37% of all pairsSmell alikelowCooked together5,435 recipes
Shared aroma: beta-damascenone (apple, rose).
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
- Shin of beef
- Releases gelatin and flavour into the stock during long simmering.
- Calves' feet
- Provide collagen that turns into gelatin, giving the jelly its set.
- Sugar
- Adds sweetness to the jelly in the sweet version.
- Lemon juice
- Adds acidity that brightens the flavour of the sweet jelly.
- Madeira
- Adds aroma and a rich, fortified flavour to the sweet jelly.
The step that matters
Skimming during the long boil. Fat and foam rise to the surface of the stock during simmering. Skimming them regularly keeps the jelly clear and free of greasy flavour, and keeping the pot full of water maintains a steady, gentle extraction.
Swap the lemon
How well each one fits the dish's main ingredients (beef, sugar):
- Raisinfits better
- Vanillafits better
- Figfits about as well
- Lemonthe original
Fit is the average pairing score against beef, 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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