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 ↓
Fried Apples with Onions
Ingredients
Directions
Prepare
Heat the butter and lard in a skillet.
Slice the apples and onions.
Cook
Add the apples and onions to the skillet.
Season with salt and pepper.
Fry until the onions are cooked through.
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.
-
Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Butter + appletop 14% of all pairsSmell alikemoderateCooked together8,706 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
-
Butter + oniontop 15% of all pairsSmell alikemoderateCooked together42,912 recipes
Shared aroma: decanal (soap, orange peel).
-
Apple + peppertop 18% of all pairsSmell alikemoderateCooked together3,026 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Apple + oniontop 19% of all pairsSmell alikemoderateCooked together3,206 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Apples
- Soften while holding some shape, and caramelize their natural sugars for sweetness and color.
- Onions
- Soften and turn sweet and savory as they cook, adding depth of flavor.
- Butter
- Carries heat evenly across the pan and adds rich flavor and gentle browning.
- Lard
- Adds fat that conducts heat well and helps the apples and onions brown without burning quickly.
The step that matters
Heat the fat before adding the apples and onions. Hot fat sears the surface of the apples and onions so they brown. If the pan is not hot enough, the moisture released from the fruit and vegetables steams them instead of browning them.
Swap the apple
How well each one fits the dish's main ingredients (butter, onion, pepper):
- Avocadofits better
- Mangofits better
- Lemonfits better
- Applethe original
Fit is the average pairing score against butter, onion, 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.
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.
Apple Soup33 recipes
Tomato Soup526 recipes
Brown Bread461 recipes
Mutton Broth292 recipes