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Peanut Butter Marshmallow Cupcakes

Delightful cupcakes filled with creamy peanut butter and marshmallow, perfect for celebrations or a cozy afternoon treat.
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Prep Time 30 minutes
Cook Time 16 minutes
Total Time 46 minutes
Servings: 12 cupcakes
Course: Dessert, Snack
Cuisine: American
Calories: 320
Ingredients Method Notes

Ingredients
  

Cupcake Batter
  • 2 cups granulated sugar
  • 1/2 cup vegetable oil
  • 3 large eggs
  • 1 tablespoon vanilla extract
  • 1/2 cup light sour cream
  • 2 1/2 cups all-purpose flour
  • 3 teaspoons baking powder
  • 1 teaspoon salt
  • 1 1/4 cups milk
Frosting
  • 1 1/2 cups unsalted butter should be at room temperature
  • 1 cup creamy peanut butter
  • 5 1/2 cups powdered sugar
  • 2 tablespoons heavy whipping cream
  • 1 tablespoon pure vanilla extract
  • 1 jar marshmallow creme
Optional Toppings
  • 2 jars marshmallow creme for filling
  • 2 cups chopped peanuts for garnish

Method
 

Preparation
  1. Preheat the oven to 350°F (175°C) and line a cupcake pan with cupcake liners.
  2. In a mixing bowl, blend together sugar, vegetable oil, eggs, and vanilla until combined.
  3. Stir in sour cream until well mixed.
  4. In another bowl, combine flour, baking powder, and salt. Gradually add this dry mixture to the wet mixture, alternating with milk, and stir until just combined.
  5. Fill the cupcake liners about two-thirds full and bake for 14-16 minutes until a toothpick comes out clean. Let them cool completely.
Frosting
  1. In a bowl, whip the butter until light and fluffy, then mix in the peanut butter until smooth.
  2. Gradually add powdered sugar, vanilla, and heavy cream until well combined.
  3. Fold in the marshmallow creme until the frosting is fluffy and smooth.
Assembly
  1. Core the cooled cupcakes and fill them with marshmallow creme.
  2. Frost the cupcakes and optionally press chopped peanuts onto the sides for added texture.

Notes

Store these cupcakes in an airtight container at room temperature for up to three days. They can also be frozen for up to two months. Let them thaw gently before consuming.