Why it works: Onion and tomato are a kitchen classic. They rank in the top 8% of all ingredient pairs, and cooks put them together in 20,633 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Macaroni with Tomato
Ingredients
Directions
Make the sauce
Fry the onion in butter until slightly colored.
Add the flour and mix well.
Gradually add the strained tomato and salt to make the sauce.
Finish and serve
Stir in the boiled macaroni and reheat in a double boiler or in the oven.
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.
-
Onion + tomatotop 8% of all pairsSmell alikemoderateCooked together20,633 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Onion + buttertop 15% of all pairsSmell alikemoderateCooked together42,912 recipes
Shared aroma: decanal (soap, orange peel).
-
Onion + flourtop 17% of all pairsSmell alikemoderateCooked together32,460 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Tomato + buttertop 22% of all pairsSmell alikemoderateCooked together6,918 recipes
Shared aroma: 3-hexenal (apple, fruity).
Butter and flour barely smell alike, yet cooks put them together in 124,287 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
- Butter
- Fats the onion and carries its flavor into the sauce, giving richness.
- Flour
- Thickens the tomato liquid into a smooth sauce as it is mixed in.
- Strained tomato
- Forms the liquid base of the sauce, providing acidity and body.
- Boiled macaroni
- Provides the starchy body of the dish, soaking up the sauce during reheating.
- Chopped onion
- Adds savory aroma and sweetness as it softens and colors in butter.
The step that matters
Add the flour and mix well. If flour is not fully mixed into the hot butter and onion, it forms lumps that stay in the sauce. Stirring it evenly coats each particle so it dissolves smoothly when liquid is added.
Swap the tomato
How well each one fits the dish's main ingredients (onion, butter, flour):
- Chivefits better
- Leekfits better
- Shallotfits better
- Tomatothe original
Fit is the average pairing score against onion, butter, flour. 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.
More macaroni with tomato sauce recipes
You might also like
The free Flavor Lab newsletter: one surprising pairing a week and the molecular reason it works, in 60 seconds. No spam, unsubscribe anytime.
Prefer an account? Create a free account to save pairings and unlock the full chemistry.
Tomato Soup526 recipes
Cream of Tomato Soup107 recipes
Tomato Bisque61 recipes
Cream Tomato Soup28 recipes