Why it works: Butter and cream are a kitchen classic. They rank in the top 8% of all ingredient pairs, and cooks put them together in 41,516 recipes. Both carry delta-dodecalactone, which smells sweet, creamy. The science ↓
Tomato Rarebit
Ingredients
Directions
Make the sauce
Melt the butter in a chafing dish.
Add the flour and gradually pour in the cream, stirring until the mixture thickens.
Mix in the tomatoes combined with baking soda.
Finish and serve
Stir in the cheese, beaten eggs, and season with salt, mustard, and cayenne to taste.
Serve the mixture on toast.
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 + creamtop 8% of all pairsSmell alikemoderateCooked together41,516 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
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Butter + cheesetop 8% of all pairsSmell alikemoderateCooked together7,962 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
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Cheese + mustardtop 11% of all pairsSmell alikemoderateCooked together1,805 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Tomato + mustardtop 11% of all pairsSmell alikemoderateCooked together2,482 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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
- Butter
- Enriches the base and carries flavor while the flour is cooked into a roux.
- Flour
- Thickens the cream into a smooth sauce that holds the cheese.
- Thin cream
- Adds moisture and richness so the sauce stays smooth and pourable.
- Stewed and strained tomatoes
- Supply acidity and flavor that cut through the richness of the cheese.
- Baking soda
- Neutralizes the tomato's acidity, reducing curdling and sharpness in the sauce.
- Cheese
- Melts into the sauce to give savory flavor and body.
- Eggs
- Thicken the sauce as they set gently with the heat, adding richness.
The step that matters
Adding the eggs. Beaten eggs can scramble if the sauce is too hot when they go in. Stirring them into a warm, not boiling, mixture lets them thicken it smoothly as they gently set.
Swap the tomato
How well each one fits the dish's main ingredients (butter, flour, cream, cheese, egg, mustard):
- Chivefits better
- Horseradishfits better
- Shallotfits better
- Tomatothe original
Fit is the average pairing score against butter, flour, cream, cheese, egg, mustard. 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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