Why it works: Potato and watercress work together. They rank in the top 4% of all ingredient pairs, and cooks put them together in 170 recipes. Both carry coumarin, which smells sweet, hay. The science ↓
Rolled Rib Roast with Riced Potatoes
Ingredients
Directions
The book says “a hot oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.
Prepare the roast
Remove the bones from the rib roast.
Skewer the meat into a round shape.
Dredge the meat with flour.
Place the meat on a rack in a dripping pan.
Roast
Bake in a hot oven at 400 °F (200 °C) until seared.
Add melted drippings mixed with hot water.
Reduce the oven temperature.
Bake for 60 to 90 minutes.
Baste often with drippings.
Dredge with flour after each basting.
Add coarse sea salt to the flour when the meat is half cooked.
Once cooled, replace the skewers with silver ones.
Make the riced potatoes and serve
Pass the hot boiled potatoes through a ricer.
Mix in the butter, salt, and hot milk or cream.
Beat the mixture thoroughly.
Pass the mixture through the ricer again.
Serve the riced potatoes around the meat.
Garnish with a stem of watercress.
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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Potato + watercresstop 4% of all pairsSmell alikemoderateCooked together170 recipes
Shared aroma: coumarin (sweet, hay).
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Flour + watercresstop 7% of all pairsSmell alikestrongCooked together340 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Potato + milktop 9% of all pairsSmell alikemoderateCooked together3,611 recipes
Shared aroma: (e,z)-2,6-nonadienal (cucumber, melon).
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Flour + buttertop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
Flour and butter 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
- Rib roast
- Provides the main meat, which is seared, then roasted slowly to stay tender.
- Flour
- Forms a crust on the meat's surface that browns and helps hold drippings.
- Drippings
- Add fat and flavor to the roast and keep its surface moist while basting.
- Potatoes
- Riced and beaten, they form a light, smooth purée that absorbs butter and milk.
- Butter
- Adds fat and richness, giving the riced potatoes a smooth texture and flavor.
- Milk or cream
- Adds moisture and richness, making the riced potatoes soft and creamy.
The step that matters
Pass the mixture through the ricer again. Ricing the potatoes breaks cells gently without releasing excess starch, which keeps them smooth. Mashing or overworking the potatoes instead makes them gluey.
Swap the potato
How well each one fits the dish's main ingredients (flour, butter, milk, watercress):
- Shallotfits better
- Chivefits better
- Leekfits about as well
- Potatothe original
Fit is the average pairing score against flour, butter, milk, watercress. 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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