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Bread

Boston Brown Bread

A steamed bread made with cornmeal, rye flour, all-purpose flour, baking soda, sour milk, molasses, and salt.

From an old cookbook · modernised transcription
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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

Make the batter

  1. Combine cornmeal, rye flour, all-purpose flour, and baking soda in a large bowl.

  2. Add sour milk gradually until the mixture is a stiff batter.

  3. Stir in molasses and salt to taste.

Steam

  1. Pour the batter into a greased mold.

  2. Steam for 4 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.

  1. Rye + flourtop 8% of all pairs
    Smell alikestrong
    Cooked together1,320 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  2. Rye + milktop 12% of all pairs
    Smell alikemoderate
    Cooked together918 recipes

    Shared aroma: ethyl 2-methylbutyrate (fruity, apple).

  3. Flour + milktop 14% of all pairs
    Smell alikelow
    Cooked together78,219 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  4. Flour + molassestop 16% of all pairs
    Smell alikemoderate
    Cooked together10,429 recipes

    Shared aroma: ethanol (alcoholic, ethereal).

  5. 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
Provides the coarse, crumbly body that gives the bread its characteristic texture.
Rye flour
Adds structure and a dense, moist crumb with a distinctive flavor.
All-purpose flour
Adds gluten-forming structure so the dense batter holds together while steaming.
Baking soda
Reacts with the acidic sour milk to produce gas that lightens the batter.
Sour milk
Supplies acidity to activate the baking soda and moisture to form a stiff batter.
Molasses
Adds sweetness, dark color, and moisture, and deepens the flavor of the bread.

The step that matters

Keep the batter stiff before steaming. Adding too much sour milk makes the batter loose, and a thin batter can become heavy or waterlogged during long steaming. Mixing in the liquid gradually lets you stop once it is stiff.

“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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