Name: Freed Tripe
Ingredients: tripe; coarse sea salt; mace; eggs; bread crumbs; fat for frying; onion sauce; lemon; tomato ketchup

Why it works: Sauce and ketchup match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 1,099 recipes. Both carry ethanol, which smells alcoholic, ethereal. The science ↓

Freed Tripe

Ingredients

Directions

Boil the tripe until tender, then let it cool completely.
Cut the tripe into pieces and roll them cornerwise.
Tie the rolled pieces with thread.
Sprinkle a little coarse sea salt and mace over the tripe.
Roll the tripe in eggs and then in bread crumbs.
Fry the tripe in hot fat until golden brown.
Serve with onion sauce, adding a little lemon and tomato ketchup.

Recipe from a historical cookbook (Internet Archive).

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.

Sauce + ketchuptop 1% of all pairs

Smell alikestrong

Cooked together1,099 recipes

Shared aroma: ethanol (alcoholic, ethereal).
Onion + tomatotop 8% of all pairs

Smell alikemoderate

Cooked together20,633 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Bread + tomatotop 10% of all pairs

Smell alikemoderate

Cooked together1,013 recipes

Shared aroma: 2-nonenal (fatty, green).
Lemon + tomatotop 11% of all pairs

Smell alikemoderate

Cooked together4,592 recipes

Shared aroma: 3-hexenal (apple, fruity).
Egg + breadtop 13% of all pairs

Smell alikemoderate

Cooked together22,662 recipes

Shared aroma: (e)-2-octenal (fatty, green).

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

Swap the mace

How well each one fits the dish's main ingredients (egg, bread, onion, sauce, lemon, tomato, ketchup):

Capersfits better
Parsleyfits better
Celeryfits better
Macethe original

Fit is the average pairing score against egg, bread, onion, sauce, lemon, tomato, ketchup. Candidates are from the same food group and used in at least 100 recipes.