Why it works: Flour and butter are a kitchen classic. They rank in the top 12% of all ingredient pairs, and 124,287 recipes mention both. Both carry isobutyraldehyde, which smells malty, green. The science ↓
Brown Sauce
Ingredients
Directions
Make the sauce
Fry flour, butter, and tomatoes until browned.
Add stock and stir until it boils.
Reduce and strain
Let it boil until reduced by one fourth, skimming well.
When free from fat, strain the sauce.
Store
Store by boiling up once or twice a week.
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.
Photo for illustrative purposes only · Contact us to use it
Explore the science
The flavor team
The pairs that carry this dish. Each one is judged two ways: how much aroma chemistry they share, and how many recipes mention both.
-
Flour + buttertop 12% of all pairsAroma overlaplowMentioned together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Butter + meattop 16% of all pairsAroma overlapmoderateMentioned together7,594 recipes
Shared aroma: guaiacol (smoky, sweet).
-
Tomato + meattop 17% of all pairsAroma overlaplowMentioned together1,438 recipes
Shared aroma: 1-octen-3-one (mushroom, metallic).
-
Butter + tomatotop 22% of all pairsAroma overlapmoderateMentioned together6,918 recipes
Shared aroma: 3-hexenal (apple, fruity).
-
Flour + tomatotop 22% of all pairsAroma overlapmoderateMentioned together7,065 recipes
Shared aroma: isobutyraldehyde (malty, green).
Flour and butter share little aroma chemistry, yet 124,287 recipes mention both: they likely 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
- Flour
- Thickens the sauce as it cooks with the butter and stock.
- Butter
- Carries the flour and tomatoes while they brown, adding richness.
- Tomatoes
- Add acidity and colour to the browned base.
- Stock
- Forms the liquid body of the sauce, giving it meaty flavour.
The step that matters
Skimming while the sauce reduces. Fat and impurities rise to the surface as the sauce boils. Skimming them off keeps the sauce clean-tasting and free from grease before straining.
Flavor stand-ins for the tomato
How well each one fits the dish's main ingredients (flour, butter, meat):
- Shallotbetter flavor fit
- Leekbetter flavor fit
- Potatobetter flavor fit
- Tomatothe original
Fit is the average pairing score against flour, butter, meat. Candidates are from the same food group and used in at least 100 recipes. This compares flavor only: it does not check the job the ingredient does in the dish (bulk, moisture, acidity, structure).
“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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