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 ↓
Macaroni Au Gratin
Ingredients
Directions
The book says “a quick oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.
Make the sauce
Melt the butter in a saucepan without browning it.
Add the flour and mix until smooth.
Stir in the cream and cook until thickened.
Season with salt and pepper.
Remove from heat and quickly stir in the egg yolk, then do not return it to heat.
Prepare the macaroni and cheese
Boil the macaroni until soft.
Melt the cheese with the butter in a separate pan.
Assemble and bake
Grease a baking dish and layer the macaroni and sauce alternately.
Pour the melted cheese and butter over the top to ensure it penetrates the dish.
Cover with bread crumbs and bake in a preheated oven at 400°F (200°C) until browned.
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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Cheese + breadtop 7% of all pairsSmell alikemoderateCooked together2,130 recipes
Shared aroma: delta-decalactone (sweet, creamy).
-
Butter + creamtop 8% of all pairsSmell alikemoderateCooked together41,516 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
-
Butter + cheesetop 8% of all pairsSmell alikemoderateCooked together7,962 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
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Cream + saucetop 9% of all pairsSmell alikemoderateCooked together4,787 recipes
Shared aroma: ethanol (alcoholic, ethereal).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Butter
- Adds richness and flavor to the sauce and melted cheese topping.
- Flour
- Thickens the sauce as its starch swells in the hot liquid.
- Cream
- Provides moisture and a smooth, rich body to the sauce.
- Cheese
- Melts into the sauce, adding savory flavor and a creamy, stretchy texture.
- Macaroni
- Forms the bulk of the dish and absorbs the sauce as it bakes.
The step that matters
Stir in the egg yolk off the heat. Egg yolk thickens by gently setting; if the sauce is returned to heat or gets too hot, the yolk can scramble and turn grainy.
“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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