Why it works: Flour and onion are a kitchen classic. They rank in the top 17% of all ingredient pairs, and cooks put them together in 32,460 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
Roasting Meat
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
Hang the mutton in a cool, dry place for 4 to 10 days, depending on the weather.
Preheat the oven to 400°F (200°C).
Wipe and scrape the mutton clean before roasting.
Roast
Place the mutton 12 inches from the fire for the first 30 minutes.
Move it to 8 inches from the fire for the next hour.
For the last 30 minutes, bring it closer to the fire.
Dredge the mutton lightly with flour and a little coarse sea salt halfway through cooking.
Repeat the dredging just before it is finished.
Make gravy and serve
Make gravy using the same method as for sirloin of beef, using less water.
Serve with vegetables and onion sauce if desired.
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.
-
Flour + oniontop 17% of all pairsSmell alikemoderateCooked together32,460 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Flour + saucetop 18% of all pairsSmell alikemoderateCooked together8,078 recipes
Shared aroma: ethanol (alcoholic, ethereal).
-
Mutton + oniontop 18% of all pairsSmell alikelowCooked together4,531 recipes
Shared aroma: 2,4-decadienal (seaweed).
-
Onion + saucetop 19% of all pairsSmell alikelowCooked together10,474 recipes
Shared aroma: ethanol (alcoholic, ethereal).
-
Mutton + saucetop 25% of all pairsSmell alikelowCooked together1,087 recipes
Shared aroma: decanoic acid (soapy, waxy).
Onion and sauce barely smell alike, yet cooks put them together in 10,474 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
- Mutton
- The main meat; roasting browns its surface and cooks it through to a tender texture.
- Flour
- Dusted on the surface, it helps form a browned, crisp crust as it heats.
The step that matters
Dredging with flour and salt. Dredging halfway through and again near the end builds a browned crust, because flour's starches and proteins brown as the surface dries in the oven. Leaving it too late gives a pale finish.
Swap the onion
The recipe marks onion as optional. How well each one fits the dish's main ingredients (mutton, flour, sauce):
- Shallotfits better
- Turnipfits better
- Arrowrootfits better
- Onionthe original
Fit is the average pairing score against mutton, flour, 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.
More roasted mutton recipes
You might also like
Mutton Broth292 recipes
Haricot Mutton59 recipes
Mutton Soup56 recipes
Curried Mutton9 recipesThe 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.