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Boston Brown Bread

A dense, sweet bread made with all-purpose flour, graham flour, cornmeal, molasses, and sour milk.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 7 ingredients
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Why it works: Flour and milk are a kitchen classic. They rank in the top 14% of all ingredient pairs, and cooks put them together in 78,219 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓

Boston Brown Bread

Oven, in the book's wordsA hot oven

Ingredients

Directions

The book says “a hot oven”. The 400°F in the steps is the modern equivalent, not the book's own figure.

Prepare the batter

  1. Mix and sift the dry ingredients together.

  2. In a separate bowl, mix the sour milk and molasses, then add to the flour mixture.

  3. Turn the batter into a greased mold and cover tightly.

Steam and finish

  1. Steam for 3 hours for a large mold or 1.5 hours for individual molds.

  2. Turn out of the mold onto a baking pan and place in a hot oven (400°F / 200°C) for a few minutes to dry the outside.

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

    Shared aroma: isobutyraldehyde (malty, green).

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

    Shared aroma: ethanol (alcoholic, ethereal).

  3. Milk + molassestop 21% of all pairs
    Smell alikelow
    Cooked together7,243 recipes

    Shared aroma: furaneol (caramel, strawberry).

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

All-purpose flour
Provides the main structure that holds the loaf together after steaming.
Graham flour
Adds coarse texture and a nutty, wheaty flavour to the loaf.
Cornmeal
Adds grainy texture and helps give the loaf its crumb.
Baking soda
Reacts with the acidic sour milk to produce gas that lightens the batter.
Sour milk
Its acidity activates the baking soda and adds moisture and tang.
Molasses
Adds moisture, sweetness, and the dark colour and rich flavour typical of the bread.

The step that matters

Covering the mold tightly before steaming. A tight seal keeps steam trapped around the batter so the loaf cooks through evenly and stays moist. If the mold leaks, water can enter and make the bread soggy, and the long steam time must be kept consistent for the bread to set properly.

“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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