Why it works: Bread and butter match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and 27,145 recipes mention both. Both carry delta-decalactone, which smells sweet, creamy. The science ↓
The recipe
Ingredients
Contains: egg, milk, wheat, fish (auto-detected from the ingredients and method; we can miss things, so check labels)
Directions
Prepare the poultry
Dip the poultry joints in egg and bread crumbs, then in clarified butter, and again in egg and bread crumbs. Set aside.
Make the sauce
Beat the yolk of an egg for 2–3 minutes in a bowl.
Gradually add 1 tablespoon dry mustard, pepper, coarse sea salt, and cayenne pepper.
Slowly incorporate 8 tablespoons of salad oil, starting with drops and then in teaspoonfuls, beating well after each addition.
Stir in 1 teaspoon vinegar and continue adding oil and vinegar until the sauce thickens to a custard‑like consistency.
Taste and adjust vinegar if desired, noting that this will thin the sauce.
Add the minced shallots, chopped tarragon, chopped chervil, and essence of anchovies to the sauce.
Serve
Pour the sauce onto a serving dish.
Broil the poultry pieces over a clear fire until browned, about 10 minutes.
Lay the broiled poultry on the sauce and garnish with minced pickled gherkins.
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 aroma chemistry they share, and how many recipes mention both.
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Bread + buttertop 3% of all pairsAroma overlapstrongMentioned together27,145 recipes
Shared aroma: delta-decalactone (sweet, creamy).
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Mustard + shallottop 3% of all pairsAroma overlapstrongMentioned together842 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
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Mustard + vinegartop 4% of all pairsAroma overlaplowMentioned together14,067 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Turkey + breadtop 5% of all pairsAroma overlapmoderateMentioned together822 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
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Mustard + peppertop 6% of all pairsAroma overlapmoderateMentioned together15,427 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Mustard and vinegar share little aroma chemistry, yet 14,067 recipes mention both: they likely 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
- Egg yolk
- Emulsifies the oil into the sauce, giving it a thick, custard-like body.
- Salad oil
- Forms the bulk of the emulsified sauce, giving it richness and body.
- Bread crumbs
- Form a crisp, browned coating on the poultry joints when broiled.
- Clarified butter
- Carries heat and browning to the coated poultry, adding richness.
- Vinegar
- Adds acidity that sharpens the sauce's flavour and helps it thicken.
- Shallots
- Add a mild sharp onion flavour to the sauce.
The step that matters
Adding the oil to the yolk. Oil must be added slowly, a few drops at first, while beating constantly. Adding it too fast prevents the yolk from emulsifying, and the sauce breaks into separated oil instead of thickening.
Flavor stand-ins for the mustard
How well each one fits the dish's main ingredients (turkey, egg, bread, butter, pepper, vinegar, shallot):
- Capsicumbetter flavor fit
- Asparagusabout as good a flavor fit
- Chiveabout as good a flavor fit
- Mustardthe original
Fit is the average pairing score against turkey, egg, bread, butter, pepper, vinegar, shallot. Candidates are from the same food group and used in at least 100 recipes. This compares flavor only: it does not check the job the ingredient does in the dish (bulk, moisture, acidity, structure).
“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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