Name: Boston Baked Rice and Beans
Ingredients: 6 slices bacon; 1 cup chopped onion; 2 15-ounce cans pinto beans, undrained; 3 cups cooked rice; 1/4 cup brown sugar; 1/2 teaspoon salt; 1/4 teaspoon ground black pepper; 3/4 cup catsup; 1 teaspoon prepared mustard; 1 teaspoon liquid smoke

Why it works: Beans and mustard match in chemistry and in kitchens. They rank in the top 4% of all ingredient pairs, and cooks put them together in 852 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. 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.

Beans + mustardtop 4% of all pairs

Smell alikestrong

Cooked together852 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Beans + ricetop 4% of all pairs

Smell alikestrong

Cooked together1,017 recipes

Shared aroma: trans-2-nonenal (cardboard, fatty).
Onion + mustardtop 6% of all pairs

Smell alikestrong

Cooked together9,259 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Onion + beanstop 7% of all pairs

Smell alikestrong

Cooked together5,242 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Pepper + mustardtop 9% of all pairs

Smell alikemoderate

Cooked together15,430 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

Bacon: Adds smoky, savory fat and crisps on top as the dish bakes.
Pinto beans: Provide the bulk and hearty texture of the dish.
Cooked rice: Adds body and soaks up the sauce as it bakes.
Brown sugar: Adds sweetness and helps the top caramelize during baking.
Catsup: Supplies tomato acidity and sweetness that form the sauce.
Onion: Adds savory flavor as it softens in the bacon fat.

The step that matters

Cook the onion until soft but not brown. Onion that browns turns bitter and dark, and it can taste harsh in the finished sauce. Gentle cooking softens it and draws out its sweetness.

Swap the onion

How well each one fits the dish's main ingredients (beans, rice, sugar, pepper, mustard):

Lettucefits better
Sweet potatofits better
Capsicumfits better
Onionthe original

Fit is the average pairing score against beans, rice, sugar, pepper, mustard. 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
Rice	1 cup cooked (158g) white	206
Pinto Bean	1/2 cup (86g) canned	122
Sugar	1 tbsp (12.5g) granulated	49
Onion	1 medium (110g)	44
Bacon	1 slice cooked (8g)	43
Black Pepper	1 tsp ground (2.3g)	6
Mustard	1 tsp (5g) yellow	3
Salt	1 tsp (6g)	0
Smoke	not in our table	0

Boston Baked Rice and Beans