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Dessert • American

Fluffernutter Cupcakes Recipe

Rich chocolate cupcakes filled with creamy marshmallow Fluff and topped with savory-sweet peanut butter buttercream. A treat adults and kids will love!

4.8 from 146 votes
43 mins
Total Time
30
cupcakes
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Fluffernutter Cupcakes

How to Make the Best Fluffernutter Cupcakes

Fluffernutter cupcakes bring together a childhood classic and sophisticated dessert flavors in one unforgettable treat. These rich chocolate cupcakes are the perfect canvas for the classic fluffernutter combination—creamy marshmallow Fluff and smooth peanut butter buttercream work together in perfect harmony.

What makes these cupcakes truly special is the contrast of flavors and textures. The deep cocoa notes of the chocolate cupcake are balanced by the sweet, pillowy marshmallow filling and the rich, savory peanut butter frosting. It’s a flavor combination that appeals to both kids and adults alike, making it perfect for parties, bake sales, or just a nostalgic treat at home.

The key to success is ensuring your butter and ingredients are at room temperature for the frosting, and not overmixing the batter once you add the boiling water. The boiling water might seem unusual, but it’s what creates the tender, moist chocolate crumb that sets these cupcakes apart.

Fluffernutter Cupcakes

Fluffernutter Cupcakes

Rich chocolate cupcakes filled with creamy marshmallow Fluff and topped with savory-sweet peanut butter buttercream. A treat adults and kids will love!

4.8 from 146 votes
CourseDessert
CuisineAmerican
Keywordfluff desserts, fluffernutter, marshmallow fluff, peanut butter and fluff
Prep Time20 mins
Cook Time23 mins
Total Time43 mins
Servings30 cupcakes
Calories334kcal
AuthorRare Ivy
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Ingredients

Cupcakes

Filling

Peanut Butter Buttercream

Instructions

Cupcakes

  1. Preheat oven to 350°F. Line cupcake tins with paper liners.
  2. In a large bowl, whisk together flour, sugar, cocoa powder, baking powder, and baking soda.
  3. In another bowl, beat eggs, oil, milk, vanilla extract, and espresso powder until combined.
  4. Pour wet ingredients into dry ingredients and mix until just combined.
  5. Slowly stir in boiling water until the batter is smooth (batter will be thin).
  6. Fill cupcake liners about two-thirds full with batter.
  7. Bake for 20-23 minutes, or until a toothpick inserted in the center comes out clean.
  8. Cool completely before filling and frosting.

Peanut Butter Buttercream

  1. Beat room temperature butter until creamy.
  2. Add peanut butter and mix until combined.
  3. Gradually add confectioner's sugar, beating until light and fluffy.

Assembly

  1. Once cupcakes are cool, use a small paring knife to cut out a cone-shaped piece from the top of each cupcake.
  2. Fill each hole with about 1 tablespoon of Fluff.
  3. Frost each cupcake with peanut butter buttercream.
  4. Serve and enjoy!

Notes

  • Use all-natural peanut butter like Teddie's for the best flavor—it has the right consistency for frosting.
  • Don't overmix the batter after adding boiling water; it should be thin and smooth.
  • For easier filling, you can use a piping bag to apply the peanut butter frosting.
  • Store cupcakes in an airtight container at room temperature for up to 2 days, or refrigerate for up to 5 days.
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