Name: Rye Gems
Ingredients: 1⅔ cups rye flour; 1⅓ cups all-purpose flour; 4 teaspoons baking powder; 1 teaspoon salt; ¼ cup molasses; 1¼ cups milk; 2 eggs; 3 tablespoons melted butter

Why it works: Milk and butter are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 81,283 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓

Rye Gems

Oven, in the book's wordsA hot oven

Ingredients

Directions

The book says “a hot oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.

Prepare

Preheat the oven to 400°F (200°C).

Make the batter

In a bowl, mix and sift the rye flour, all-purpose flour, baking powder, and salt.
Add the molasses, milk, beaten eggs, and melted butter to the dry ingredients. Mix until well combined.

Bake

Pour the batter into buttered gem pans.
Bake for 25 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.

Milk + buttertop 7% of all pairs

Smell alikemoderate

Cooked together81,283 recipes

Shared aroma: (z)-4-heptenal (biscuit, cream).
Rye + flourtop 8% of all pairs

Smell alikestrong

Cooked together1,320 recipes

Shared aroma: isobutyraldehyde (malty, green).
Flour + buttertop 12% of all pairs

Smell alikelow

Cooked together124,287 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 and butter barely smell alike, yet cooks put them together in 124,287 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 flour: Gives the gems a dense, hearty texture and a distinctive earthy flavour.
All-purpose flour: Provides gluten structure so the gems hold their shape while baking.
Baking powder: Releases gas in the batter, causing the gems to rise and lighten.
Eggs: Add structure and richness, helping the batter set as it bakes.
Molasses: Adds sweetness, moisture, and deep flavour, and helps the gems brown.
Melted butter: Adds fat for tenderness and flavour in the crumb.

“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.