Why it works: Butter and bread are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 27,232 recipes. Both carry delta-decalactone, which smells sweet, creamy. The science ↓
Roast Leg of Pork
Ingredients
Directions
The book gives no oven temperature. The 400°F in the steps was added when the recipe was transcribed, as a starting point.
Prepare
Score the skin of the leg in lines for carving.
Optionally, remove the bone and fill the cavity with seasoned bread crumbs mixed with lemon juice or vinegar.
Tie the leg with string to maintain shape and prevent dressing from escaping.
Roast and make gravy
Place the leg in a pan with a little water.
Heat slowly to avoid blistering, basting with butter until enough gravy forms.
Cook for at least 2 hours in a hot oven (400°F / 200°C).
Once done, remove the leg, skim fat from the gravy, add boiling water, and thicken with flour.
Season the gravy to taste.
Serve
Serve with apple sauce and pickles.
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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Butter + breadtop 7% of all pairsSmell alikemoderateCooked together27,232 recipes
Shared aroma: delta-decalactone (sweet, creamy).
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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Bread + appletop 14% of all pairsSmell alikemoderateCooked together1,790 recipes
Shared aroma: 2,4-decadienal (seaweed).
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Lemon + appletop 14% of all pairsSmell alikemoderateCooked together7,551 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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Butter + appletop 14% of all pairsSmell alikemoderateCooked together8,706 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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
- Pig leg
- Provides the main meat, which becomes tender and carvable after slow roasting.
- Butter
- Adds fat for basting, helping the skin brown and enriching the drippings.
- Flour
- Thickens the gravy as it is mixed with the pan juices and boiling water.
- Bread crumbs
- Form the dressing that fills the cavity, absorbing juices and giving the stuffing body.
The step that matters
Heat slowly at the start. Starting in a gentle heat lets fat render and moisture form gravy while the skin dries gradually, so it is less likely to blister.
Swap the lemon
The recipe marks lemon as optional. How well each one fits the dish's main ingredients (butter, flour, bread, apple, sauce):
- Figfits better
- Raisinfits better
- Pearfits better
- Lemonthe original
Fit is the average pairing score against butter, flour, bread, apple, 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.
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