Name: Boston Brown Bread
Ingredients: 1 cup cornmeal (scalded with boiling water); 1 cup rye flour; 1 cup molasses; 1 cup sour milk; 2 teaspoons baking soda (dissolved in sour milk); 1 cup sweet milk; ¼ teaspoon salt; 1 egg; 1 tablespoon melted butter; ½ cup stoned raisins; 2 cups white flour

Why it works: Flour and raisin match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 9,075 recipes. Both carry isobutyraldehyde, which smells malty, green. 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.

Flour + raisintop 1% of all pairs

Smell alikestrong

Cooked together9,075 recipes

Shared aroma: isobutyraldehyde (malty, green).
Milk + buttertop 7% of all pairs

Smell alikemoderate

Cooked together81,283 recipes

Shared aroma: (z)-4-heptenal (biscuit, cream).
Rye + flourtop 8% of all pairs

Smell alikestrong

Cooked together1,320 recipes

Shared aroma: isobutyraldehyde (malty, green).
Rye + raisintop 11% of all pairs

Smell alikemoderate

Cooked together50 recipes

Shared aroma: ethyl caproate (fruity, apple peel).
Flour + buttertop 12% of all pairs

Smell alikelow

Cooked together124,287 recipes

Shared aroma: isobutyraldehyde (malty, green).

Flour and butter 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

Cornmeal: Scalded cornmeal softens and absorbs liquid, giving the bread a moist, tender, slightly coarse crumb.
Rye flour: Adds a dense, earthy structure and flavor that differs from white flour.
Molasses: Adds sweetness, dark color, and moisture with a deep flavor.
Sour milk: Reacts with baking soda to produce gas that leavens the bread and adds slight acidity.
Baking soda: Reacts with the acidic sour milk to raise the batter during steaming.
White flour: Provides gluten-based structure so the bread holds together after steaming.

The step that matters

Steam and serve. The bread must steam long enough to set fully through the center. Water can run low in the pot, and lifting the lid releases steam, so the loaf may stay gummy or sink. Keep the water level steady and the pot covered.

“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.

Boston Brown Bread