Why it works: Milk and butter are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 81,283 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓
Butter Scotch Pie
Ingredients
Directions
Make the filling
Mix the egg yolk, flour, and 1 cup of milk in a bowl until well combined.
Melt the butter in a skillet over medium heat.
Add the brown sugar and 4 tablespoons of milk to the melted butter.
Let the mixture cool for 5 minutes.
Pour the egg mixture into the skillet.
Cook the mixture slowly until thickened.
Pour the filling into the baked pie crust.
Top and bake
Chop or grind the fine nuts.
Sprinkle the nuts on top of the pie.
Beat the egg white with a little sugar until stiff.
Spread the whipped egg white on top of the pie.
Brown the pie in the oven until the topping is golden.
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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Milk + buttertop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Walnut + nutstop 9% of all pairsSmell alikemoderateCooked together284 recipes
Shared aroma: alpha-pinene (pine, turpentine).
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Flour + buttertop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Flour + walnuttop 12% of all pairsSmell alikemoderateCooked together5,873 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Flour + nutstop 13% of all pairsSmell alikemoderateCooked together1,180 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
- Egg yolk
- Thickens the filling as it cooks and adds richness to the custard.
- Flour
- Thickens the custard so it sets into a sliceable filling.
- Milk
- Forms the liquid base of the custard and keeps the filling moist.
- Butter
- Adds fat and flavour to the caramel-style base.
- Brown sugar
- Provides the sweetness and the characteristic butterscotch flavour.
- Egg white
- Whipped with sugar to form a stiff topping that browns in the oven.
The step that matters
Cook the mixture slowly until thickened. Egg yolk and flour thicken the filling only as the starch swells and the yolk sets gently. Heating too fast can scorch the sugars or curdle the yolk, leaving a lumpy or grainy custard.
Swap the nuts
How well each one fits the dish's main ingredients (egg, flour, milk, walnut, butter, sugar):
- Almondfits better
- Pistachiofits better
- Macadamia nutfits better
- Nutsthe original
Fit is the average pairing score against egg, flour, milk, walnut, butter, sugar. 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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