Name: Sour Cream Fudge with Walnuts
Ingredients: ¾ cup sour cream; ¼ cup milk; 2 tbsp corn syrup; 2 tbsp butter or margarine; 2 cups sugar; 1 tsp vanilla; ½ cup walnut halves (optional)

Why it works: Milk and vanilla are a kitchen classic. They rank in the top 5% of all ingredient pairs, and cooks put them together in 19,187 recipes. Both carry ethyl caproate, which smells fruity, apple peel. The science ↓

Sour Cream Fudge with Walnuts

Ingredients

Directions

Prepare

Butter an 8‑inch square pan, set aside.
Lightly butter the side of a heavy, medium saucepan.

Make the fudge

Combine sour cream, milk, corn syrup, butter, and sugar in the prepared saucepan.
Cook over medium heat, stirring constantly, until the sugar dissolves and the mixture comes to a boil.
Wash down the sides of the pan with a pastry brush frequently dipped in hot water to remove sugar crystals.
Add a candy thermometer.
Continue to cook until the mixture reaches the soft‑ball stage (238 °F).
Pour the mixture into a large heat‑proof mixing bowl.
Cool to lukewarm (115 °F).
Add vanilla and beat with a heavy‑duty electric mixer until thick.
Spread the mixture into the prepared pan.

Set and serve

Score the fudge into small squares with a knife.
Refrigerate until firm.
Cut the fudge into squares.
Place walnut halves on each piece.
Store in the refrigerator.

Nutrition, whole recipe (rough)

515Calories

29 gProtein

24 gFat

49 gCarbs

Counts 7 of 8 ingredients. The other 1 aren't in our nutrition table and add nothing above, so the real totals are higher.

What these numbers assume: 7 portions

Ingredient	Portion assumed	kcal
Milk	1 cup (244ml) whole	149
Butter	1 tbsp (14g)	102
Yogurt	170g plain Greek	100
Corn	1/2 cup kernels (82g)	77
Sugar	1 tbsp (12.5g) granulated	49
Walnut	1 walnut half (4g)	26
Vanilla	1 tsp extract (4ml)	12
Syrup	not in our table	0

One typical portion per ingredient; the recipe's quantities are not counted. A rough guide only, not for medical or dietary planning.

Recipe from the Recipes Wiki (Fandom).

Steps grouped into stages for easier reading; the method is the source's own.

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 + vanillatop 5% of all pairs

Smell alikemoderate

Cooked together19,187 recipes

Shared aroma: ethyl caproate (fruity, apple peel).
Syrup + sugartop 6% of all pairs

Smell alikestrong

Cooked together5,842 recipes

Shared aroma: ethanol (alcoholic, ethereal).
Milk + buttertop 7% of all pairs

Smell alikemoderate

Cooked together81,283 recipes

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

Smell alikemoderate

Cooked together41,516 recipes

Shared aroma: delta-dodecalactone (sweet, creamy).
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

Sour cream: Adds richness and a tangy flavor while keeping the fudge creamy.
Sugar: Provides sweetness and, when cooked to soft-ball stage, sets the fudge's firm, smooth texture.
Corn syrup: Interferes with sugar crystallization, helping the fudge stay smooth rather than grainy.
Butter: Contributes fat for a tender texture and rich flavor.
Milk: Adds moisture and dairy richness to the sugar syrup.

The step that matters

Cooking to the soft-ball stage. Sugar syrup must reach about 238 °F so that, once cooled and beaten, it sets into fudge. Stopping early leaves it too soft; going too far makes it hard and grainy. Washing down the pan sides prevents stray sugar crystals from triggering graininess.

Swap the walnut

The recipe marks walnut as optional. How well each one fits the dish's main ingredients (cream, milk, corn, syrup, butter, sugar, vanilla):

Almondfits better
Chestnutfits better
Hazelnutfits better
Walnutthe original

Fit is the average pairing score against cream, milk, corn, syrup, butter, sugar, 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.