Why it works: Lettuce and mustard match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 1,356 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Sweetbread Salad
Ingredients
Directions
Prepare the sweetbreads and lettuce
Blanch the sweetbreads as directed.
Boil them for 15 minutes.
Cool the sweetbreads.
Slice the sweetbreads.
Wash the lettuce in cold salted water.
Dry the lettuce on a clean towel.
Make the dressing
Combine the egg yolk, dry mustard, salt, pepper, and vinegar in a bowl.
Mix to a smooth cream.
Stir in oil gradually to form a thick paste.
Add a little vinegar to liquefy the dressing.
Continue alternating adding more oil and vinegar until you have enough dressing.
Assemble and serve
Arrange the lettuce on a salad dish.
Place the sweetbreads on top.
Pour the dressing over them.
Serve the salad immediately.
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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Lettuce + mustardtop 1% of all pairsSmell alikestrongCooked together1,356 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Mustard + vinegartop 7% of all pairsSmell alikemoderateCooked together14,067 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Mustard + peppertop 9% of all pairsSmell alikemoderateCooked together15,430 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Lettuce + peppertop 9% of all pairsSmell alikemoderateCooked together4,037 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Pepper + vinegartop 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 tender, mild-flavored meat that forms the body of the salad.
- Raw egg yolk
- Emulsifies the oil and vinegar so the dressing becomes thick and smooth.
- Oil
- Forms the rich, thick body of the dressing when stirred into the yolk.
- Dry mustard
- Helps stabilize the emulsion and adds a sharp, pungent flavor.
- Vinegar
- Adds acidity that balances the richness of the oil and yolk.
- Lettuce
- Provides crisp, cool leaves that give the salad its fresh texture.
The step that matters
Adding the oil gradually to the yolk. Oil must be added slowly to the egg yolk mixture so it disperses into tiny droplets. Adding it too fast can break the emulsion, leaving a greasy, separated dressing instead of a thick, smooth one.
Swap the lettuce
How well each one fits the dish's main ingredients (egg, mustard, pepper, vinegar):
- Horseradishfits better
- Capsicumfits about as well
- Shallotfits about as well
- Lettucethe original
Fit is the average pairing score against egg, mustard, pepper, vinegar. 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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