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
The book gives no oven temperature. The 400°F (200°C) in the steps was added when the recipe was transcribed, as a starting point.
Prepare
Divide the neck of mutton into cutlets and place them in a pie dish.
Season the cutlets well with coarse sea salt and black pepper.
Layer the sliced apples and onions on top, sprinkling with sugar.
Half fill the dish with boiling water.
Bake and serve
Bake in a 400°F (200°C) oven for about 2 hours.
Before serving, pour the gravy out from the side, skim off the fat, and add the mushroom ketchup.
Season the gravy to taste and return it to the pie.
Serve hot.
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 fat that cook down into the rich gravy of the pie.
- Apples
- Add tart flavor and soften during baking, balancing the richness of the meat.
- Onions
- Soften and sweeten as they cook, adding savory depth to the gravy.
- Mushroom ketchup
- Adds concentrated savory, umami flavor to the gravy after the fat is removed.
The step that matters
Skimming the fat from the gravy. Fat from the mutton rises to the surface of the cooking liquid and can make the gravy greasy and heavy. Pouring the gravy off the side and skimming before adding the mushroom ketchup lets the flavor come through cleanly.
Swap the apple
How well each one fits the dish's main ingredients (mutton, onion, mushroom, ketchup, sugar, pepper):
- Lemonfits better
- Limefits better
- Red currantfits better
- Applethe original
Fit is the average pairing score against mutton, onion, mushroom, ketchup, sugar, 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.
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