Name: Boston Brown Bread
Ingredients: 1 cup rye flour; 1 cup whole wheat flour; 1 cup cornmeal; 1 cup molasses; 1 teaspoon baking soda; 1 pint buttermilk; ¼ teaspoon salt

Why it works: Rye and wheat match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 404 recipes. Both carry coumarin, which smells sweet, hay. The science ↓

Boston Brown Bread

Ingredients

Directions

Make the batter

In a large bowl, combine the rye flour, whole wheat flour, cornmeal, and molasses.
Dissolve the baking soda in the buttermilk and add it to the mixture along with the salt. Mix well until combined.

Steam and serve

Pour the batter into a greased loaf pan.
Cover and steam the bread for 5 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 + wheattop 1% of all pairs

Smell alikestrong

Cooked together404 recipes

Shared aroma: coumarin (sweet, hay).
Rye + flourtop 8% of all pairs

Smell alikestrong

Cooked together1,320 recipes

Shared aroma: isobutyraldehyde (malty, green).
Flour + buttermilktop 8% of all pairs

Smell alikemoderate

Cooked together3,721 recipes

Shared aroma: ethanol (alcoholic, ethereal).
Molasses + buttermilktop 11% of all pairs

Smell alikemoderate

Cooked together526 recipes

Shared aroma: ethanol (alcoholic, ethereal).
Flour + wheattop 12% of all pairs

Smell alikemoderate

Cooked together4,373 recipes

Shared aroma: isobutyraldehyde (malty, green).

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

What each ingredient does

Rye flour: Provides the characteristic earthy flavor and structure of the loaf.
Whole wheat flour: Adds body and a nutty flavor while giving the crumb some structure.
Cornmeal: Adds coarse texture and helps give the loaf its grainy crumb.
Molasses: Adds sweetness, dark color, and moisture to the batter.
Baking soda: Reacts with the acidic buttermilk to produce gas that lightens the loaf.
Buttermilk: Adds moisture and acidity that activates the baking soda for rising.

The step that matters

Dissolving the baking soda in the buttermilk. Baking soda needs an acid to release carbon dioxide. Dissolving it fully in the buttermilk before mixing spreads the reaction evenly, so the loaf rises without pockets of soda or a bitter taste.

“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