Name: Sand Tarts
Ingredients: 2 cups sugar (heaped); 1 cup butter; 4 cups flour (level); 2 eggs (beaten); cinnamon (for sprinkling); sugar (for sprinkling)

Why it works: Flour and cinnamon are a kitchen classic. They rank in the top 9% of all ingredient pairs, and cooks put them together in 17,341 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓

Sand Tarts

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.

Make the dough

In a bowl, combine the sugar and butter until smooth.
Add the flour and beaten eggs, mixing until well combined.
Roll out the dough and cut it into cake shapes.

Bake

Brush the tops with the beaten egg.
Sprinkle with cinnamon and sugar.
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.

Flour + cinnamontop 9% of all pairs

Smell alikemoderate

Cooked together17,341 recipes

Shared aroma: isobutyraldehyde (malty, green).
Sugar + cinnamontop 10% of all pairs

Smell alikelow

Cooked together30,779 recipes

Shared aroma: guaiacol (smoky, sweet).
Butter + flourtop 12% of all pairs

Smell alikelow

Cooked together124,287 recipes

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

Smell alikemoderate

Cooked together92,116 recipes

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

Smell alikemoderate

Cooked together17,784 recipes

Shared aroma: anethole (sweet, anise).

Sugar and cinnamon barely smell alike, yet cooks put them together in 30,779 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

Butter: Adds fat that makes the dough rich and tender when creamed with sugar.
Eggs: Bind the dough and add richness, helping it hold its cut shapes.
Flour: Provides the structure that holds the cut cookie shapes together.
Sugar: Sweetens the dough and helps it brown during baking.