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 ↓
Banana Sauce
Ingredients
Directions
Prepare the sauce
Rub the bananas through a fine sieve.
In a saucepan, combine the sugar and boiling water.
Add the banana pulp and bring to a boil, skimming if necessary.
Thicken and serve
In a bowl, rub the butter with the flour, then stir in a little of the liquid from the saucepan.
Add this mixture back to the saucepan along with the lemon juice and rind.
Serve the sauce warm.
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 + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Sugar + flourtop 15% of all pairsSmell alikemoderateCooked together92,116 recipes
Shared aroma: phenylacetaldehyde (hawthorne, honey).
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Banana + buttertop 15% of all pairsSmell alikemoderateCooked together1,536 recipes
Shared aroma: ethyl caproate (fruity, apple peel).
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Banana + lemontop 16% of all pairsSmell alikemoderateCooked together1,134 recipes
Shared aroma: 1-octen-3-ol (mushroom, earthy).
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Butter + lemontop 16% of all pairsSmell alikemoderateCooked together41,227 recipes
Shared aroma: 3-hexenal (apple, fruity).
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
- Bananas
- Their pulp provides the body and banana flavour of the sauce.
- Granulated sugar
- Adds sweetness and helps give the sauce a smooth, syrupy body.
- Butter
- Adds richness and a smooth mouthfeel to the sauce.
- Flour
- Thickens the sauce when rubbed with butter and stirred into the hot liquid.
- Lemon
- Adds acidity and brightness that balances the sweetness of the banana.
The step that matters
Adding the butter and flour mixture. Flour thickens only when it is hydrated and heated, so stirring in a little hot liquid first helps the mixture blend smoothly without lumps before it returns to the saucepan.
Swap the banana
How well each one fits the dish's main ingredients (sugar, butter, flour, lemon):
- Raisinfits better
- Vanillafits better
- Figfits better
- Bananathe original
Fit is the average pairing score against sugar, butter, flour, lemon. 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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