Name: Old-fashioned Pineapple Upside-down Cake
Ingredients: ½ cup butter, softened; ¾ cup packed light brown sugar; 8 ounce can drained, sliced pineapple; 9 maraschino cherries; 1 cup sugar; 1 cup all-purpose flour; ¼ teaspoon salt; ¼ cup plus 1 tablespoon water; 1 teaspoon vanilla extract; 3 egg whites (room temperature)

Why it works: Pineapple and vanilla match in chemistry and in kitchens. They rank in the top 2% of all ingredient pairs, and cooks put them together in 911 recipes. Both carry ethyl isobutyrate, which smells fruity, ethereal. The science ↓

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.

Pineapple + vanillatop 2% of all pairs

Smell alikestrong

Cooked together911 recipes

Shared aroma: ethyl isobutyrate (fruity, ethereal).
Sugar + vanillatop 8% of all pairs

Smell alikelow

Cooked together35,032 recipes

Shared aroma: beta-damascenone (apple, rose).
Butter + flourtop 12% of all pairs

Smell alikelow

Cooked together124,287 recipes

Shared aroma: isobutyraldehyde (malty, green).
Flour + vanillatop 12% of all pairs

Smell alikemoderate

Cooked together19,241 recipes

Shared aroma: isobutyraldehyde (malty, green).
Butter + vanillatop 14% of all pairs

Smell alikemoderate

Cooked together20,050 recipes

Shared aroma: guaiacol (smoky, sweet).

Sugar and vanilla barely smell alike, yet cooks put them together in 35,032 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

Butter: Adds richness and a tender crumb, and carries flavor through the cake.
Light brown sugar: Adds moisture and caramel-like sweetness that browns the topping.
Egg whites: Whipped to stiff peaks, they trap air and help the cake rise and hold its structure.
All-purpose flour: Provides the starch and gluten network that gives the cake its structure.
Sugar: Sweetens the batter and helps keep the crumb tender and moist.

The step that matters

Folding in the beaten egg whites. The whites are full of trapped air. Stirring too hard or too long deflates the foam, so the cake rises less and bakes up denser.

Swap the pineapple

How well each one fits the dish's main ingredients (butter, sugar, flour, vanilla, egg):

Raisinfits better
Figfits better
Blueberryfits better
Pineapplethe original

Fit is the average pairing score against butter, sugar, flour, vanilla, egg. 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.

Ingredient	Portion assumed	kcal
Flour	1 cup (125g) all-purpose	455
Butter	1 tbsp (14g)	102
Cherry	1 cup (138g)	87
Pineapple	1 cup chunks (165g)	82
Egg	1 large egg (50g)	78
Sugar	1 tbsp (12.5g) granulated	49
Vanilla	1 tsp extract (4ml)	12
Salt	1 tsp (6g)	0
Water	not in our table	0

Old-fashioned Pineapple Upside-down Cake