Name: Boston Brown Bread
Ingredients: 1 pint molasses; 1 pint rye flour; 1 pint yellow cornmeal; 1 pint Graham flour; 2 ounces compressed yeast; 3 ounces baking soda; a little coarse sea salt; 1 pint lukewarm water

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

The book gives no oven temperature. The 300°F (150°C) in the steps was added when the recipe was transcribed, as a starting point.

Mix the dough

In a large bowl, combine molasses, rye flour, yellow cornmeal, and Graham flour.
Dissolve the yeast in lukewarm water and add to the flour mixture.
Mix in baking soda and salt until well combined.

Shape and bake

Shape the dough into molds that are 3 to 4 inches wide and 6 to 8 inches high.
Cover the molds and bake in a cool oven at 300°F (150°C) for 12 hours or steam for about 4 hours.
Let the bread cool before removing from molds.

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).
Molasses + flourtop 16% of all pairs

Smell alikemoderate

Cooked together10,429 recipes

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

Smell alikelow

Cooked together804 recipes

Shared aroma: ethanol (alcoholic, ethereal).

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

What each ingredient does

Molasses: Adds sweetness, dark colour and moisture to the batter.
Rye flour: Adds flavour and structure alongside the other flours.
Yellow cornmeal: Adds coarse texture and body to the dough.
Graham flour: Adds a nutty flavour and a tender, hearty crumb.
Compressed yeast: Produces gas that lifts the dough and gives it an airy crumb.
Baking soda: Reacts with the molasses acidity to lift the bread and darken its colour.

The step that matters

Baking in a cool oven or steaming for the full time. Long, gentle heat sets the dense crumb slowly without drying it out. Cutting the time short leaves the centre gummy and underbaked, so the bread needs its full duration.

“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