Name: Warm Potato Salad
Ingredients: 6 medium potatoes; 6 slices bacon; ½ cup diced red onions; 1 teaspoon flour; 2 teaspoons granulated sugar; 2 teaspoons salt; 1 teaspoon freshly ground black pepper; 3 tablespoons vinegar; ½ cup water; 1 tablespoon fresh parsley

Why it works: Pepper and parsley match in chemistry and in kitchens. They rank in the top 2% of all ingredient pairs, and cooks put them together in 34,122 recipes. Both carry 4'-methylacetophenone, which smells bitter almond. 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.

Pepper + parsleytop 2% of all pairs

Smell alikestrong

Cooked together34,122 recipes

Shared aroma: 4'-methylacetophenone (bitter almond).
Potato + oniontop 3% of all pairs

Smell alikemoderate

Cooked together9,023 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Potato + parsleytop 5% of all pairs

Smell alikemoderate

Cooked together2,855 recipes

Shared aroma: 4'-methylacetophenone (bitter almond).
Onion + parsleytop 9% of all pairs

Smell alikemoderate

Cooked together25,843 recipes

Shared aroma: 2,4-decadienal (seaweed).
Potato + peppertop 9% of all pairs

Smell alikemoderate

Cooked together8,305 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Potatoes: Form the bulk of the salad and soak up the warm dressing.
Bacon: Adds savory, smoky flavor and fat for frying the onions and flour.
Red onions: Add sharpness and aroma that mellow as they cook in the bacon fat.
Flour: Thickens the bacon fat so the dressing becomes slightly cohesive.
Sugar: Balances the sharpness of the vinegar and adds mild sweetness.
Vinegar: Adds acidity that gives the dressing its tangy bite.

The step that matters

Cook the flour into the bacon fat until lightly browned. Flour must cook in the fat for a short time to lose its raw taste and to brown slightly. Adding the liquid too early can leave lumps, and skipping the browning leaves the dressing pasty and flat.

Swap the onion

How well each one fits the dish's main ingredients (potato, flour, sugar, pepper, vinegar, parsley):

Shallotfits better
Capsicumfits better
Carrotfits better
Onionthe original

Fit is the average pairing score against potato, flour, sugar, pepper, vinegar, parsley. 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
Potato	1 medium (173g) baked	161
Sugar	1 tbsp (12.5g) granulated	49
Red Onion	1 medium (110g)	44
Bacon	1 slice cooked (8g)	43
Black Pepper	1 tsp ground (2.3g)	6
Vinegar	1 tbsp (15ml) distilled	3
Parsley	1 tbsp chopped fresh (3.8g)	1
Salt	1 tsp (6g)	0
Water	not in our table	0

Warm Potato Salad