Name: Italian Eggs on Toast
Ingredients: 8 eggs; 2 tablespoons butter, melted; 2 cups warm milk or 1 cup cream; 2 tablespoons flour; pepper to taste; coarse sea salt to taste; slices of toasted bread

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 ↓

Italian Eggs on Toast

Ingredients

Directions

Prepare the eggs

Boil the eggs for 15 minutes, then drop them into cold water and remove the shells.
Separate the egg whites from the yolks; chop the whites and sieve the yolks.

Make the sauce

In a saucepan, melt the butter and add the flour, stirring to combine.
Gradually add the warm milk (or cream) while stirring constantly until bubbling.
Stir in the chopped egg whites and season with salt and pepper.

Serve

Place the toasted bread on a hot platter and top each slice with the egg dressing.
Sprinkle the sieved yolks over the top of each slice.

Recipe from a historical cookbook (Internet Archive).

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.

Butter + breadtop 7% of all pairs

Smell alikemoderate

Cooked together27,232 recipes

Shared aroma: delta-decalactone (sweet, creamy).
Butter + milktop 7% of all pairs

Smell alikemoderate

Cooked together81,283 recipes

Shared aroma: (z)-4-heptenal (biscuit, cream).
Milk + breadtop 11% of all pairs

Smell alikemoderate

Cooked together11,466 recipes

Shared aroma: 2-undecenal (sweet).
Butter + flourtop 12% of all pairs

Smell alikelow

Cooked together124,287 recipes

Shared aroma: isobutyraldehyde (malty, green).
Egg + breadtop 13% of all pairs

Smell alikemoderate

Cooked together22,662 recipes

Shared aroma: (e)-2-octenal (fatty, 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

Eggs: Provide the main body of the topping, with whites chopped into the sauce and yolks sieved for garnish.
Butter: Enriches the sauce with fat and flavour while forming the base of the roux.
Flour: Thickens the melted butter and milk into a smooth, coating sauce.
Milk: Forms the liquid of the sauce, giving it a creamy, pourable texture.

The step that matters

Add the warm milk gradually while stirring constantly. Adding liquid slowly while stirring keeps the flour evenly dispersed, so the sauce thickens smoothly instead of forming lumps.

“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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Italian Eggs on Toast