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Close-up Image of Gooey White Chocolate Fluffernutter Cake Bars 

Gooey White Chocolate Fluffernutter Cake Bars

These Gooey White Chocolate Fluffernutter Cake Bars are a sweet and delicious dessert bar filled with peanut butter, gooey marshmallow and white chocolate. They're terrific!
Course Dessert
Cuisine American
Keyword cake bars, cake mix recipe, dessert bars recipe, easy dessert recipe, marshmallow dessert, peanut butter bars recipe, peanut butter dessert
Prep Time 10 minutes
Cook Time 24 minutes
Total Time 34 minutes
Servings 12 bars
Calories 570kcal
Author Jenny


  • Oven


  • 1 box yellow cake mix
  • 1 large egg
  • 8 tbsp unsalted butter softened
  • 1/2 cup creamy peanut butter
  • 1/2 cup marshmallow fluff
  • 14 oz can sweetened condensed milk
  • 12 oz bag white chocolate chips


  • Place cake mix, egg, and butter into a large bowl. Mix until well combined, will be the consistency of thick cookie dough. I used my hands towards the ends. Press dough into prepared baking pan.
  • Place peanut butter, marshmallow creme and condensed milk into a large bowl and mix until well combined. Pour over crust then top with white chips.
  • Bake for 23-25 minutes, until cooked through. Center will seem somewhat jiggly, but will set up while cools.
  • Let cool completely, cut into squares and serve.


Calories: 570kcal | Carbohydrates: 77g | Protein: 9g | Fat: 27g | Saturated Fat: 14g | Cholesterol: 51mg | Sodium: 437mg | Potassium: 299mg | Fiber: 1g | Sugar: 58g | Vitamin A: 353IU | Vitamin C: 1mg | Calcium: 250mg | Iron: 1mg