Why it works: Pepper and tomato are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 17,923 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Sweetbreads with Tomato Gravy
Ingredients
Directions
The book says “a quick oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.
Prepare and boil
Season sweetbreads with black pepper to taste.
Boil sweetbreads for 30 minutes.
Make the gravy
Thicken the gravy with a little browned flour and add butter.
Let it stew for a few minutes.
Bake and serve
Transfer to a 400°F (200°C) oven to brown.
Remove sweetbreads to a dish.
Pour in less than a pint of stewed tomatoes seasoned with salt, pepper, and butter, and bring to a boil.
Pour over the sweetbreads and serve hot.
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.
-
Pepper + tomatotop 7% of all pairsSmell alikemoderateCooked together17,923 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Flour + buttertop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Pepper + flourtop 19% of all pairsSmell alikemoderateCooked together50,459 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Pepper + buttertop 21% of all pairsSmell alikemoderateCooked together85,593 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
-
Butter + tomatotop 22% of all pairsSmell alikemoderateCooked together6,918 recipes
Shared aroma: 3-hexenal (apple, fruity).
Flour and butter 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
- Sweetbreads
- The main protein, firmed by boiling before it is browned in the oven.
- Browned flour
- Thickens the gravy and adds a toasted, nutty flavor.
- Butter
- Adds richness and a smooth mouthfeel to the gravy.
- Stewed tomatoes
- Provide acidity and moisture that give the gravy its tangy flavor.
The step that matters
Thickening the gravy. Browned flour must be stirred in evenly and stewed for a few minutes so its starch swells fully and the gravy thickens smoothly without raw, floury lumps or taste.
Swap the tomato
How well each one fits the dish's main ingredients (pepper, flour, butter):
- Shallotfits better
- Chivefits better
- Capsicumfits better
- Tomatothe original
Fit is the average pairing score against pepper, flour, butter. 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.
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