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
Combine cornmeal, rye flour, all-purpose flour, and baking soda in a large bowl.
Add sour milk gradually until the mixture is a stiff batter.
Stir in molasses and salt to taste.
Steam
Pour the batter into a greased mold.
Steam for 4 hours.
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.
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Rye + flourtop 8% of all pairsSmell alikestrongCooked together1,320 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Rye + milktop 12% of all pairsSmell alikemoderateCooked together918 recipes
Shared aroma: ethyl 2-methylbutyrate (fruity, apple).
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Flour + milktop 14% of all pairsSmell alikelowCooked together78,219 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Flour + molassestop 16% of all pairsSmell alikemoderateCooked together10,429 recipes
Shared aroma: ethanol (alcoholic, ethereal).
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Rye + molassestop 16% of all pairsSmell alikelowCooked 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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