Name: Boston Brown Bread
Ingredients: 1 pint all-purpose flour; 1 pint cornmeal; 1 pint sour milk; 1 teacup molasses; 1 teaspoon baking soda

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

Ingredients

Directions

The book gives no oven temperature. The 350°F (175°C) in the steps was added when the recipe was transcribed, as a starting point.

Prepare

Grease a tin well.
In a bowl, mix the flour, cornmeal, sour milk, molasses, and baking soda until combined.
Pour the mixture into the prepared tin.

Steam and bake

Steam for 2.5 hours.
Bake in a preheated oven at 350°F (175°C) for 15 minutes.

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

All-purpose flour: Provides the main structure that holds the loaf together.
Cornmeal: Adds a coarse, grainy texture and a sturdier crumb.
Sour milk: Adds moisture and acidity that reacts with the baking soda.
Molasses: Adds sweetness, moisture and a dark color to the bread.
Baking soda: Produces gas with the acidic sour milk, helping the bread rise.

“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.