Name: Onions, Spanish, Stuffed
Ingredients: 6 or 8 small Spanish onions; 4 tablespoons finely chopped liver or raw meat (cooked meat may be used instead); 1 tablespoon parboiled finely chopped onion; 1 tablespoon breadcrumbs; 1 teaspoon powdered sage or mixed herbs; 1 egg; salt and pepper to taste; ½ pint brown sauce

Why it works: Sage and pepper match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and cooks put them together in 5,388 recipes. Both carry beta-phellandrene, which smells minty, terpene. The science ↓

Onions, Spanish, Stuffed

Oven, in the book's wordsA moderate oven

Ingredients

6 or 8 small Spanish onions
4 tablespoons finely chopped liver or raw meat (cooked meat may be used instead)
1 tablespoon parboiled finely chopped onion
1 tablespoon breadcrumbs
1 teaspoon powdered sage or mixed herbs
1 egg
salt and pepper to taste
½ pint brown sauce

Directions

The book says “a moderate oven”. The 350°F (175°C) in the steps is the modern equivalent, not the book's own figure.

Prepare the onions

Skin and parboil the onions.
Use a round cutter or small knife to remove the center part of each onion.

Fill and bake

Mix all ingredients except the brown sauce together.
Fill each onion with the mixture.
Baste the onions with hot butter or dripping.
Bake in a moderate oven at 350°F (175°C) for 30 to 40 minutes, basting frequently.
Serve with the brown sauce poured over.

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.

Sage + peppertop 3% of all pairs

Smell alikestrong

Cooked together5,388 recipes

Shared aroma: beta-phellandrene (minty, terpene).
Onion + peppertop 11% of all pairs

Smell alikemoderate

Cooked together68,474 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Liver + sagetop 12% of all pairs

Smell alikelow

Cooked together229 recipes

Shared aroma: 1,8-cineol (eucalyptus, camphor).
Onion + sagetop 12% of all pairs

Smell alikemoderate

Cooked together3,628 recipes

Shared aroma: coumarin (sweet, hay).
Onion + livertop 15% of all pairs

Smell alikelow

Cooked together1,420 recipes

Shared aroma: furaneol (caramel, strawberry).

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

What each ingredient does

Egg: Binds the filling so it holds together when baked.
Breadcrumbs: Absorb moisture and help give the filling body.
Liver or raw meat: Provides the main savoury filling that cooks through inside the onion.
Spanish onions: Form the edible shell that softens and sweetens as it bakes.

The step that matters

Basting during baking. Basting with hot fat carries heat to the onion surface and keeps it from drying out, so the shells soften and brown evenly while the filling cooks through.

Swap the onion

How well each one fits the dish's main ingredients (liver, sage, egg, pepper, sauce):

Capsicumfits better
Mustardfits better
Shallotfits better
Onionthe original

Fit is the average pairing score against liver, sage, egg, pepper, sauce. 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.

Tomato Soup526 recipes

Brown Bread461 recipes

Mutton Broth292 recipes

Yorkshire Pudding264 recipes

Like knowing why a recipe works?

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.

Onions, Spanish, Stuffed