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Boston Brown Bread

A steamed bread made with cornmeal, rye flour, graham flour, sour milk, molasses, and baking soda.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 7 ingredients
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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

Prepare

  1. Mix together the cornmeal, rye flour, graham flour, and salt.

  2. Dissolve the baking soda in the sour milk and mix with the flour mixture.

  3. Add the molasses and stir until combined.

  4. Pour the batter into oiled narrow tins.

Steam and serve

  1. Steam for 4 hours.

  2. Serve with lettuce, celery, apple, or tomato salad, and nut butter.

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

Coarse cornmeal
Gives the bread its coarse, grainy texture and characteristic structure.
Rye flour
Adds flavour and helps form the crumb structure of the bread.
Graham flour
Adds bran and wholegrain body, giving a denser, nutty texture.
Baking soda
Reacts with the acidic sour milk to produce gas that lifts the batter.
Sour milk
Supplies acidity to activate the baking soda and adds moisture.
Molasses
Adds moisture, sweetness, and a dark colour to the bread.

The step that matters

Dissolving the baking soda in the sour milk. Baking soda needs an acid to react and release gas. Dissolving it fully in the sour milk before mixing spreads the reaction evenly, so the bread rises uniformly instead of leaving pockets or dense spots.

“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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