Why it works: Pepper and onion 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 ↓
Water Turtles or Terrapins
Ingredients
Directions
Prepare the turtle
Plunge the turtle into a pot of boiling water for 5 minutes.
Skin the tender parts of the turtle.
Remove the horny parts of the feet.
Soak the turtle in cold salted water for 10 minutes.
Boil the turtle in hot salted water until tender, depending on size and age.
Drain the turtle and wipe it dry.
Carefully loosen the shell and cut it open.
Remove the entrails and gall bag.
Cut the meat into small pieces.
Save the juice from the meat.
Make the stew
Season the meat with pepper, salt, onion, sweet herbs, and spiced sauce or catsup.
Combine everything in a saucepan with a tight lid.
Stew gently for 15 minutes, stirring occasionally.
Add a large spoonful of butter, browned flour mixed with cold water, and brown sherry.
Mix the egg yolk with a little hot liquid to prevent curdling, then add the egg mixture to the saucepan.
Bring to a boil once.
Transfer to a covered dish.
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 + oniontop 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).
-
Butter + sherrytop 14% of all pairsSmell alikemoderateCooked together3,505 recipes
Shared aroma: ethyl octanoate (fruity, wine).
-
Sauce + buttertop 15% of all pairsSmell alikelowCooked together15,338 recipes
Shared aroma: ethanol (alcoholic, ethereal).
-
Onion + buttertop 15% of all pairsSmell alikemoderateCooked together42,912 recipes
Shared aroma: decanal (soap, orange peel).
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
- Turtle
- Provides the tender meat that forms the body of the stew.
- Browned flour
- Thickens the cooking liquid so the stew becomes smooth and rich.
- Egg yolk
- Enriches and thickens the sauce, adding body and a silky texture.
- Brown sherry
- Adds acidity and depth of flavour to the sauce.
- Butter
- Adds fat and richness, giving the sauce a rounder mouthfeel.
The step that matters
Adding the egg yolk. Egg yolk thickens when heated gently but curdles if it meets hot liquid directly. Mixing it with a little hot liquid first tempers it, so the sauce stays smooth and does not scramble.
Swap the onion
How well each one fits the dish's main ingredients (pepper, sauce, butter, flour, sherry, egg):
- Capsicumfits better
- Shallotfits better
- Chivefits better
- Onionthe original
Fit is the average pairing score against pepper, sauce, butter, flour, sherry, egg. 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
Brown Bread461 recipes
Mutton Broth292 recipes
Yorkshire Pudding264 recipes