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 ↓
Cream Tomato Sauce
Ingredients
Directions
Simmer the tomatoes
Heat a pint of strained tomatoes and 1 slice of onion.
Add 1 blade of mace, 1 bay leaf, and a pinch of soda to the tomatoes; boil gently until reduced by half.
Rub together 1 tablespoon of flour and 1 tablespoon of butter; add to the tomatoes and cook for 1–2 minutes.
Finish the sauce
Remove from heat and add 2 cupfuls of rich milk, a spoonful of pepper, and 2 teaspoons of salt; stir.
Strain and serve.
Nutrition, whole recipe (rough)
Counts 6 of 7 ingredients. The other 1 aren't in our nutrition table and add nothing above, so the real totals are higher.
What these numbers assume: 6 portions
| Ingredient | Portion assumed | kcal |
|---|---|---|
| Flour | 1 cup (125g) all-purpose | 455 |
| Butter | 1 tbsp (14g) | 102 |
| Onion | 1 medium (110g) | 44 |
| Black Pepper | 1 tsp ground (2.3g) | 6 |
| Bay Leaf | 1 leaf (0.6g) | 2 |
| Salt | 1 tsp (6g) | 0 |
| Mace | not in our table | 0 |
One typical portion per ingredient; the recipe's quantities are not counted. A rough guide only, not for medical or dietary planning.
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. See the original page.
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 + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 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).
-
Mace + peppertop 16% of all pairsSmell alikelowCooked together12,257 recipes
Shared aroma: myristicin (spice, warm).
-
Onion + macetop 17% of all pairsSmell alikelowCooked together7,078 recipes
Shared aroma: eugenol (clove, spicy).
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
- Adds fat and richness, and forms the roux with the flour.
- Flour
- Thickens the sauce once cooked with the butter into a roux.
- Rich milk (in the method)
- Adds creaminess and softens the sharpness of the tomatoes.
- Soda (in the method)
- A pinch reduces some of the tomatoes' acidity.
The step that matters
Cooking the butter and flour into the tomatoes. Cooking the flour and butter for 1–2 minutes removes the raw floury taste and lets the starch thicken evenly. Adding it unevenly or too quickly can leave lumps or a pasty flavour.
Swap the mace
How well each one fits the dish's main ingredients (onion, butter, flour, pepper):
- Parsleyfits better
- Garlicfits better
- Turmericfits better
- Macethe original
Fit is the average pairing score against onion, butter, flour, pepper. 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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