Why it works: Ketchup and sugar match in chemistry and in kitchens. They rank in the top 8% of all ingredient pairs, and cooks put them together in 260 recipes. Both carry ethanol, which smells alcoholic, ethereal. The science ↓
Squab Pie
Ingredients
Directions
Prepare
Trim the neck of mutton into neat chops and season them with salt and pepper.
Peel, core, and slice the apples.
Peel and slice the onions.
Assemble and bake
Lay the chops in a pie dish.
Add the apples and onions on top of the chops.
Sprinkle some sugar over the filling.
Cover with the suet crust.
Bake for 45 minutes.
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.
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Ketchup + sugartop 8% of all pairsSmell alikestrongCooked together260 recipes
Shared aroma: ethanol (alcoholic, ethereal).
-
Onion + mushroomtop 10% of all pairsSmell alikemoderateCooked together10,626 recipes
Shared aroma: 2,4-decadienal (seaweed).
-
Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Mushroom + peppertop 11% of all pairsSmell alikemoderateCooked together13,580 recipes
Shared aroma: 2-nonenal (fatty, green).
-
Mutton + mushroomtop 13% of all pairsSmell alikemoderateCooked together685 recipes
Shared aroma: 1-octen-3-ol (mushroom, earthy).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Neck of mutton
- Provides the meat and rich flavour that forms the body of the pie.
- Apples
- Add moisture and a bright sweetness that balances the savoury meat.
- Onions
- Contribute savoury depth and moisture as they soften during baking.
- Suet crust
- Forms a sturdy, tender pastry lid that seals in the juices while baking.
- Sugar
- Adds sweetness that balances the savoury meat and sharp apples.
The step that matters
Cover with the suet crust. The crust must seal the dish fully so steam and juices stay inside, keeping the meat moist and the filling from drying out during baking.
Swap the apple
How well each one fits the dish's main ingredients (mutton, onion, mushroom, ketchup, pepper, sugar):
- Lemonfits better
- Limefits better
- Red currantfits better
- Applethe original
Fit is the average pairing score against mutton, onion, mushroom, ketchup, pepper, sugar. 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.
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