Why it works: Butter and flour are a kitchen classic. They rank in the top 12% of all ingredient pairs, and cooks put them together in 124,287 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
Plum Pie
Ingredients
Directions
The book says “a moderate oven”. The 350°F (175°C) in the steps is the modern equivalent, not the book's own figure.
Prepare
Cut the plums in half and remove the stones.
Make a pastry dough and line a pie dish with it.
Assemble
Layer the plums and sugar in the dish, using ¾ cup of sugar for every 1 pound of plums.
Roll out more pastry to cover the pie, leaving a small opening in the center for steam to escape.
Bake
Bake in a moderate oven at 350°F (175°C) until golden brown.
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 + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Sugar + flourtop 15% of all pairsSmell alikemoderateCooked together92,116 recipes
Shared aroma: phenylacetaldehyde (hawthorne, honey).
-
Plum + buttertop 16% of all pairsSmell alikemoderateCooked together710 recipes
Shared aroma: ethyl octanoate (fruity, wine).
-
Sugar + buttertop 17% of all pairsSmell alikemoderateCooked together98,233 recipes
Shared aroma: guaiacol (smoky, sweet).
-
Plum + flourtop 19% of all pairsSmell alikemoderateCooked together777 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
- Plums
- Provide the fruit filling and most of the juice that becomes the pie's body.
- Sugar
- Adds sweetness and draws juice out of the fruit to form a syrup.
- Butter
- Adds fat to the pastry, giving it richness and a tender, flaky texture.
- Flour
- Forms the gluten network that gives the pastry dough its structure.
The step that matters
Leaving a steam opening in the top crust. Plums release steam and juice as they heat. Without a vent in the top crust, pressure can build and force filling out, making the pie soggy or cracked.
Swap the plum
How well each one fits the dish's main ingredients (sugar, butter, flour):
- Raisinfits better
- Vanillafits better
- Figfits better
- Plumthe original
Fit is the average pairing score against sugar, butter, flour. 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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