Why it works: Onion and pepper are a kitchen classic. They rank in the top 11% of all ingredient pairs, and cooks put them together in 68,474 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Macaroni, Savoury
Ingredients
Directions
The book says “a gentle oven”. The 300°F (150°C) in the steps is the modern equivalent, not the book's own figure.
Cook the macaroni
Break the macaroni into 1-inch pieces and boil in water for 15 minutes.
Drain and return to the pot with stock, onion, pepper, and salt.
Simmer gently until the macaroni is tender but unbroken.
Make the custard
In a bowl, whisk together milk and eggs to make a custard.
Bake and serve
Place the macaroni in a greased dish and pour the custard over it.
Bake in a 300°F (150°C) oven until the custard is set and lightly browned.
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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Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Milk + eggtop 18% of all pairsSmell alikemoderateCooked together88,785 recipes
Shared aroma: 2-nonenal (fatty, green).
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Onion + milktop 20% of all pairsSmell alikemoderateCooked together13,418 recipes
Shared aroma: hexanal (green, grassy).
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Pepper + milktop 22% of all pairsSmell alikemoderateCooked together26,984 recipes
Shared aroma: ethyl 2-methylbutyrate (fruity, apple).
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Pepper + eggtop 33% of all pairsSmell alikelowCooked together50,580 recipes
Shared aroma: 2-nonenal (fatty, green).
Pepper and egg barely smell alike, yet cooks put them together in 50,580 recipes: they 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
- Eggs
- Set the custard as they cook, giving it a firm, sliceable structure.
- Milk
- Forms the liquid base of the custard and keeps it soft and moist.
- Pipe macaroni
- Provides the bulk and body of the dish, holding its shape within the custard.
- Stock
- Adds savoury depth to the macaroni as it simmers.
- Onion
- Adds aromatic sweetness and savoury flavour as it softens in the stock.
The step that matters
Simmer gently until the macaroni is tender but unbroken. Vigorous boiling can break the pasta apart and make the dish mushy. Gentle heat cooks the starch evenly while the pieces hold their shape.
Swap the onion
How well each one fits the dish's main ingredients (pepper, milk, egg):
- Capsicumfits better
- Potatofits better
- Asparagusfits better
- Onionthe original
Fit is the average pairing score against pepper, milk, egg. 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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