Why it works: Onion and flour 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 ↓
Protose Roast with Brown Gravy
Ingredients
Directions
The book gives no oven temperature. The 300°F (150°C) in the steps was added when the recipe was transcribed, as a starting point.
Prepare
Layer sliced protoze and finely sliced onion in a small tin or dripper, sprinkling with coarse sea salt.
Bake
Cover with water and bake at 300°F (150°C) for 2 to 3 hours, adding water as needed.
Once cooked, remove the protoze from the tin and add more water if necessary.
Make the gravy
Thicken the remaining liquid with a mixture of brown and white flour stirred with water.
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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Onion + flourtop 17% of all pairsSmell alikemoderateCooked together32,460 recipes
Shared aroma: isobutyraldehyde (malty, green).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Protose
- Forms the main body of the roast and carries its savoury, meaty bite.
- Onion
- Adds sweetness and aroma as it softens and cooks into the roast.
- Brown flour
- Thickens the cooking liquid into a gravy and adds a slightly nutty, deeper flavour.
- White flour
- Thickens the cooking liquid into a smooth gravy with a lighter colour and flavour.
The step that matters
Thicken the gravy with flour stirred into water. Flour mixed directly into hot liquid can clump. Stirring it first into water to form a smooth slurry lets the starch disperse evenly, so the gravy thickens smoothly as it heats.
“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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