Name: Cooking Light's Sweet Potato Casserole
Ingredients: from linda fields; cyberealm bbs 315-786-1120; 3 cup mashed cooked sweet potatoes; (about 2 ¼ pounds); 1/3 cup firmly packed brown sugar; 1/3 cup skim milk; 2 tbsp reduced calorie stick melted; .margarine; 1 tsp vanilla; 1/2 tsp salt; 2 egg whites, lightly beaten; vegetable cooking spray; 1/2 cup firmly packed brown sugar; 1/4 cup flour; 2 tbsp chilled reduced-calorie; .stick margarine; 1/3 cup chopped pecans

Why it works: Sweet potato and pecans match in chemistry and in kitchens. They rank in the top 5% of all ingredient pairs, and cooks put them together in 136 recipes. Both carry 2,3-pentanedione, which smells butter, sweet. 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.

Sweet potato + pecanstop 5% of all pairs

Smell alikestrong

Cooked together136 recipes

Shared aroma: 2,3-pentanedione (butter, sweet).
Milk + vanillatop 5% of all pairs

Smell alikemoderate

Cooked together19,187 recipes

Shared aroma: ethyl caproate (fruity, apple peel).
Sweet potato + vanillatop 7% of all pairs

Smell alikestrong

Cooked together189 recipes

Shared aroma: guaiacol (smoky, sweet).
Vanilla + pecanstop 8% of all pairs

Smell alikemoderate

Cooked together1,691 recipes

Shared aroma: alpha-pinene (pine, turpentine).
Sugar + vanillatop 8% of all pairs

Smell alikelow

Cooked together35,032 recipes

Shared aroma: beta-damascenone (apple, rose).

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

Mashed cooked sweet potatoes: Provides the main body and moisture of the casserole filling.
Egg whites: Set during baking to give the filling structure and a custard-like firmness.
Brown sugar: Adds sweetness and moisture, and helps the topping brown.
Chilled margarine: Cut into the flour so the topping becomes crumbly and rich rather than dense.
Pecans: Add crunch and a toasty flavor to the crumbly topping.

The step that matters

Cut in the chilled margarine until coarse meal forms. Keeping the fat cold and in small pieces makes the topping crumbly and crisp; melted or overworked fat blends into the flour and turns the topping dense and greasy.

Swap the pecans

How well each one fits the dish's main ingredients (sweet potato, sugar, milk, vanilla, egg, flour):

Almondfits better
Chestnutfits better
Milletfits better
Pecansthe original

Fit is the average pairing score against sweet potato, sugar, milk, vanilla, egg, flour. 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
Pecans	1 oz (28g / ~19 halves)	196
Potato	1 medium (173g) baked	161
Milk	1 cup (244ml) whole	149
Vegetable	1 tbsp (14g)	120
Butter	1 tbsp (14g)	102
Egg	1 large egg (50g)	78
Sugar	1 tbsp (12.5g) granulated	49
Vanilla	1 tsp extract (4ml)	12
Salt	1 tsp (6g)	0

Cooking Light's Sweet Potato Casserole