Why it works: Spinach and mustard match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and cooks put them together in 503 recipes. Both carry trans-2-hexenal, which smells green, leafy. The science ↓
Spinach with Bgg Sauce
Ingredients
Directions
Prepare the spinach
Soak the spinach in cold water for several hours, picking over each leaf carefully.
Wash the spinach in several waters until no sand remains.
Cook the spinach in 1 quart of boiling water with 1 teaspoon of salt for 20 minutes.
Skim out the greens and mound them on a vegetable dish.
Make the egg sauce
In a bowl, mash the yolk of a hard-boiled egg with 1 tablespoon of melted butter, adding salt, cayenne, and mustard.
Beat the raw egg with 1 tablespoon of melted butter or olive oil, then add 2 tablespoons of cider vinegar and the other ingredients.
Cook the mixture over a kettle until slightly thickened, then stir in the finely chopped egg white.
Serve
Serve the sauce with the spinach.
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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Spinach + mustardtop 3% of all pairsSmell alikestrongCooked together503 recipes
Shared aroma: trans-2-hexenal (green, leafy).
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Spinach + peppertop 6% of all pairsSmell alikemoderateCooked together3,400 recipes
Shared aroma: nonanal (fat, citrus).
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Cider + vinegartop 6% of all pairsSmell alikemoderateCooked together3,431 recipes
Shared aroma: 4-ethyl-2-methoxyphenol (smoky, clove).
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Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Mustard + vinegartop 7% of all pairsSmell alikemoderateCooked together14,067 recipes
Shared aroma: isobutyraldehyde (malty, green).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Spinach
- Forms the bulk of the dish and carries the sauce as its main vegetable.
- Raw egg
- Thickens the sauce as it cooks gently, giving it a creamy, lightly set body.
- Hard-boiled egg yolk
- Enriches the sauce with a smooth, rich texture when mashed with butter.
- Melted butter
- Adds fat for richness and a smooth, silky mouthfeel to the sauce.
- Cider vinegar
- Adds acidity that brightens the rich egg and butter flavours.
- Milk
- Adds moisture that loosens the sauce to a pourable consistency.
The step that matters
Cooking the egg sauce until slightly thickened. Egg proteins set with gentle heat and can curdle or scramble if overheated, so the sauce should be cooked slowly and stirred until it just thickens.
Swap the spinach
How well each one fits the dish's main ingredients (egg, butter, pepper, mustard, cider, vinegar, milk):
- Capsicumfits better
- Shallotfits better
- Horseradishfits better
- Spinachthe original
Fit is the average pairing score against egg, butter, pepper, mustard, cider, vinegar, milk. 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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