Name: Rye Biscuit
Ingredients: 2 cups rye meal; 1½ cups all-purpose flour; ⅓ cup molasses; 1 egg; ¼ teaspoon salt; 2 cups sour milk; 2 teaspoons baking soda

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 ↓

Rye Biscuit

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 and shape the dough

In a large bowl, combine rye meal, flour, molasses, egg, salt, sour milk, and baking soda. Mix until well combined.
Shape the dough into biscuits.

Bake

Place on a baking sheet and bake in a preheated oven at 350°F (175°C) until golden brown.

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).
Rye + milktop 12% of all pairs

Smell alikemoderate

Cooked together918 recipes

Shared aroma: ethyl 2-methylbutyrate (fruity, apple).
Flour + milktop 14% of all pairs

Smell alikelow

Cooked together78,219 recipes

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

Smell alikelow

Cooked together106,462 recipes

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

Smell alikemoderate

Cooked together10,429 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

Rye meal: Gives the biscuits their dark, earthy flavour and a denser crumb than wheat flour alone.
All-purpose flour: Provides gluten structure so the dough holds its shape when shaped and baked.
Molasses: Adds sweetness and depth, and helps the biscuits brown.
Egg: Binds the dough and adds structure and richness.
Sour milk: Adds moisture and acidity, which reacts with the baking soda to help the biscuits rise.
Baking soda: Reacts with the acidic sour milk and molasses to produce gas that lifts the dough.

“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.