Why it works: Pepper and lemon match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and cooks put them together in 27,047 recipes. Both carry trans-2-nonenal, which smells cardboard, fatty. The science ↓
Croquettes of Sweetbreads
Ingredients
Directions
Prepare the sweetbreads
Soak sweetbreads in cold salted water for 1 hour, removing pipes and membranes.
Boil in salted water with vinegar for 20 minutes, then cool in cold water.
Chop sweetbreads finely to a paste and season with salt, pepper, and onion.
Shape and coat
Add egg yolks, butter, cream, and enough cracker crumbs to form a stiff mixture.
Shape into small balls or corks.
Roll the balls in cracker crumbs.
Dip the balls in beaten egg.
Roll again in cracker crumbs.
Fry and serve
Fry in hot fat until golden brown.
Drain on brown paper.
Serve hot with sliced lemon or parsley.
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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Pepper + lemontop 3% of all pairsSmell alikestrongCooked together27,047 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
-
Butter + creamtop 8% of all pairsSmell alikemoderateCooked together41,516 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
-
Pepper + oniontop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Vinegar + oniontop 14% of all pairsSmell alikemoderateCooked together18,226 recipes
Shared aroma: acetic acid (sour, vinegar).
-
Vinegar + peppertop 14% of all pairsSmell alikemoderateCooked together27,814 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Sweetbreads
- Provide the main body of the croquettes, chopped into a paste that gives a soft, tender filling.
- Egg yolks
- Bind the mixture and add richness and a smooth, set texture.
- Butter
- Adds fat for richness and a tender mouthfeel in the filling.
- Cream
- Adds moisture and softness to the filling so it holds together smoothly.
- Cracker crumbs
- Give the stiff mixture body and form a crisp, browning outer coating.
- Beaten eggs
- Act as a binder so the crumb coating adheres evenly before frying.
The step that matters
Frying in hot fat until golden brown. If the fat is not hot enough, the coating absorbs oil and turns greasy before it browns; if too hot, the outside darkens before the filling is heated through.
Swap the onion
How well each one fits the dish's main ingredients (veal, vinegar, pepper, egg, butter, cream, lemon):
- Capsicumfits better
- Asparagusfits better
- Spinachfits better
- Onionthe original
Fit is the average pairing score against veal, vinegar, pepper, egg, butter, cream, lemon. 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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