Name: Barefoot Contessa Lemon Cake
Ingredients: 1/2 pound unsalted butter, at room temp; 2 1/2 cups granulated sugar; 4 extra-large eggs at room temp; 1/3 cup grated lemon zest (6-8 large lemons); 3 cups all-purpose flour; 1/2 teaspoon baking powder; 1/2 teaspoon baking soda; 1 teaspoon kosher salt; 3/4 cup freshly squeezed lemon juice; 3/4 cup buttermilk at room temp.; 1 teaspoon pure vanilla extract; Glaze; 2 cups confectioners' sugar; 3 1/2 tablespoons freshly squeezed lemon juice

Why it works: Flour and buttermilk are a kitchen classic. They rank in the top 8% of all ingredient pairs, and cooks put them together in 3,721 recipes. Both carry ethanol, which smells alcoholic, ethereal. The science ↓

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 + buttermilktop 8% of all pairs

Smell alikemoderate

Cooked together3,721 recipes

Shared aroma: ethanol (alcoholic, ethereal).
Sugar + vanillatop 8% of all pairs

Smell alikelow

Cooked together35,032 recipes

Shared aroma: beta-damascenone (apple, rose).
Sugar + buttermilktop 9% of all pairs

Smell alikestrong

Cooked together2,973 recipes

Shared aroma: ethanol (alcoholic, ethereal).
Butter + flourtop 12% of all pairs

Smell alikelow

Cooked together124,287 recipes

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

Smell alikemoderate

Cooked together19,241 recipes

Shared aroma: isobutyraldehyde (malty, green).

Sugar and vanilla barely smell alike, yet cooks put them together in 35,032 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

Unsalted butter: Creams with sugar to trap air, giving the cake a tender, fine crumb.
Granulated sugar: Sweetens the cake and, creamed with butter, helps create a light structure.
Eggs: Add structure and richness, and help bind the batter as they set in the oven.
All-purpose flour: Provides the main structure that holds the cake's crumb together as it bakes.
Buttermilk: Adds moisture and tang, and its acidity tenderizes the crumb.
Baking soda: Reacts with the acidic buttermilk and lemon juice to lift the batter as it bakes.

The step that matters

Alternating flour and buttermilk mixtures. Adding the flour and liquid in alternating portions, starting and ending with flour, keeps the batter emulsified and smooth. Overmixing once flour is added develops gluten, which can make the cake tough.

Swap the lemon

How well each one fits the dish's main ingredients (butter, sugar, egg, flour, buttermilk, vanilla):

Raisinfits better
Figfits better
Blueberryfits better
Lemonthe original

Fit is the average pairing score against butter, sugar, egg, flour, buttermilk, vanilla. Candidates are from the same food group and used in at least 100 recipes.

“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.

Ingredient	Portion assumed	kcal
Flour	1 cup (125g) all-purpose	455
Milk	1 cup (244ml) whole	149
Butter	1 tbsp (14g)	102
Egg	1 large egg (50g)	78
Sugar	1 tbsp (12.5g) granulated	49
Lemon	juice of 1 lemon (48ml)	12
Vanilla	1 tsp extract (4ml)	12
Salt	1 tsp (6g)	0

Barefoot Contessa Lemon Cake