Name: Boston Brown Bread
Ingredients: 1 cup cornmeal; 1 cup rye flour; 1 cup graham flour; 2 cups molasses; 2 cups sweet milk; 1 cup sour milk; 2 teaspoons baking soda; 1 teaspoon salt

Why it works: Rye and flour match in chemistry and in kitchens. They rank in the top 8% of all ingredient pairs, and cooks put them together in 1,320 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓

Boston Brown Bread

Ingredients

Directions

Prepare

Sift together the cornmeal, rye flour, and graham flour.
In a separate bowl, mix the molasses, sweet milk, and sour milk.
Combine the wet and dry ingredients, then add the baking soda and salt.

Cook

Pour the mixture into a greased loaf pan.
Boil for four hours.

Recipe from a historical cookbook (Internet Archive).

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.

Rye + flourtop 8% of all pairs

Smell alikestrong

Cooked together1,320 recipes

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

Smell alikemoderate

Cooked together918 recipes

Shared aroma: ethyl 2-methylbutyrate (fruity, apple).
Flour + milktop 14% of all pairs

Smell alikelow

Cooked together78,219 recipes

Shared aroma: isobutyraldehyde (malty, green).
Flour + molassestop 16% of all pairs

Smell alikemoderate

Cooked together10,429 recipes

Shared aroma: ethanol (alcoholic, ethereal).
Rye + molassestop 16% of all pairs

Smell alikelow

Cooked together804 recipes

Shared aroma: ethanol (alcoholic, ethereal).

Flour and milk barely smell alike, yet cooks put them together in 78,219 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: Gives the bread its coarse, crumbly texture and characteristic grainy body.
Rye flour: Adds a dense, hearty structure and a mildly tangy flavor.
Graham flour: Contributes coarse bran and nutty flavor, adding body to the crumb.
Molasses: Adds sweetness, dark color, and moisture to the loaf.
Sour milk: Its acidity reacts with the baking soda to produce gas, helping the bread rise.
Baking soda: Reacts with the acidic sour milk and molasses to leaven the batter.

The step that matters

Combine the wet and dry ingredients, then add the baking soda and salt.. Baking soda starts reacting as soon as it meets acid, so the batter should be mixed evenly and placed in the pan promptly to trap the gas and get a good rise.

“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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Boston Brown Bread