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 ↓
Summer Squash
Ingredients
Directions
Prepare the greens
Pick over and wash the greens thoroughly, then soak in cold water until ready to cook.
Boil plenty of salted water and cook the greens until tender.
Drain and chop the greens finely until they form a soft green paste.
Make the sauce
In a separate bowl, cream the butter, then add the egg yolks, salt, pepper, and mustard, mixing well.
Stir in the cream and combine with the chopped greens.
Return the mixture to the saucepan and heat gently, removing from heat as soon as hot to prevent the eggs from cooking too much.
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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Butter + creamtop 8% of all pairsSmell alikemoderateCooked together41,516 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
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Pepper + mustardtop 9% of all pairsSmell alikemoderateCooked together15,430 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Spinach + creamtop 17% of all pairsSmell alikemoderateCooked together1,130 recipes
Shared aroma: octanal (fat, soap).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Greens
- Provide the bulk and the green flavour of the dish once chopped into a paste.
- Butter
- Adds richness and a smooth, silky texture to the mixture.
- Egg yolks
- Thicken the mixture gently when heated and give it a creamy body.
- Cream
- Adds moisture and richness, softening the mixture into a smooth sauce.
The step that matters
Gentle reheating after adding the egg yolks. Egg yolks begin to set and can curdle or turn grainy if overheated. Heating gently and removing the pan from the heat as soon as the mixture is hot keeps it smooth and creamy.
Swap the mustard
How well each one fits the dish's main ingredients (spinach, butter, egg, pepper, cream):
- Asparagusfits better
- Chivefits better
- Leekfits better
- Mustardthe original
Fit is the average pairing score against spinach, butter, egg, pepper, cream. 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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