Name: Boston Brown Bread
Ingredients: 1 bowl cornmeal; 1 bowl brown flour; 1 bowl sour milk; 1 large cup molasses; 1 teaspoon baking soda; coarse sea salt to taste

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 quick oven

Ingredients

Directions

Mix cornmeal, brown flour, sour milk, molasses, baking soda, and salt in a bowl.
Pour the mixture into a greased bread pan.
Steam for three 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.

Flour + milktop 14% of all pairs

Smell alikelow

Cooked together78,219 recipes

Shared aroma: isobutyraldehyde (malty, green).
Flour + molassestop 16% of all pairs

Smell alikemoderate

Cooked together10,429 recipes

Shared aroma: ethanol (alcoholic, ethereal).
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

Cornmeal: Provides the coarse, grainy body and bulk of the loaf.
Brown flour: Adds structure and gives the bread its wheat flavour and chew.
Sour milk: Its acidity reacts with the baking soda so the bread rises and stays moist.
Molasses: Adds sweetness, dark colour and moisture, and helps the bread brown.
Baking soda: Reacts with the acidic sour milk to release gas that leavens the batter.

“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.