Name: Mother Briggs' Ginger Cookies
Ingredients: 1 cup New Orleans molasses; ½ cup brown sugar; ⅔ cup sour milk; 2 tablespoons ginger; 1 teaspoon salt; 1 heaping teaspoon baking soda; Flour (enough to make a soft dough)

Why it works: Molasses and sugar are a kitchen classic. They rank in the top 11% of all ingredient pairs, and cooks put them together in 9,225 recipes. Both carry ethanol, which smells alcoholic, ethereal. The science ↓

Mother Briggs' Ginger Cookies

Oven, in the book's wordsA quick oven

Ingredients

Directions

The book says “a quick oven”. The 350°F (175°C) in the steps is the modern equivalent, not the book's own figure.

Make the dough

In a bowl, combine molasses, brown sugar, sour milk, ginger, salt, and baking soda. Mix until well combined.
Gradually add flour until a soft dough forms.

Shape and bake

Roll out the dough and cut into desired shapes.
Bake in a preheated oven at 350°F (175°C) until golden.

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.

Molasses + sugartop 11% of all pairs

Smell alikemoderate

Cooked together9,225 recipes

Shared aroma: ethanol (alcoholic, ethereal).
Molasses + gingertop 14% of all pairs

Smell alikelow

Cooked together4,116 recipes

Shared aroma: ethanol (alcoholic, ethereal).
Milk + flourtop 14% of all pairs

Smell alikelow

Cooked together78,219 recipes

Shared aroma: isobutyraldehyde (malty, green).
Sugar + flourtop 15% of all pairs

Smell alikemoderate

Cooked together92,116 recipes

Shared aroma: phenylacetaldehyde (hawthorne, honey).
Ginger + flourtop 15% of all pairs

Smell alikemoderate

Cooked together8,564 recipes

Shared aroma: isobutyraldehyde (malty, green).

Milk and flour 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

New orleans molasses: Provides dark color, moisture, and the main sweet, slightly bitter flavor.
Sour milk: Its acidity reacts with the baking soda so the cookies rise and turn tender.
Baking soda: Reacts with the acidic sour milk and molasses to produce gas that lightens the dough.
Flour: Forms the structure that holds the cookies together as they bake.