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Cake Mix Peanut Butter Bars Recipe

Cake mix and peanut butter bars are the perfect combination! And it is so easy to make!
Prep Time10 mins
Cook Time25 mins
Total Time35 mins
Course: Dessert
Cuisine: American
Keyword: Cake Mix Bars, Cake mix dessert, Cake Mix peanut butter bars, Dessert bars
Servings: 24
Calories: 201kcal


  • 9x13-inch Baking Pan
  • Medium Mixing Bowl
  • Hand mixer
  • Small Mixing Bowl


  • 1 cup peanut butter
  • ½ cup water
  • 1 large egg
  • 15.25 ounces yellow cake mix


  • ½ cup margarine softened, 1 stick
  • ¼ cup milk
  • 2 teaspoons vanilla (1-2 depending on your taste)
  • 3 Tablespoons cocoa powder
  • 3 cups powdered sugar


  • Heat the oven to 350°F.
  • Spray a 13 X 9-inch pan with no-stick cooking spray.
  • In a medium bowl combine 1 cup of peanut butter, water and egg in large bowl, stirring until smooth. Stir in cake mix until blended well. Spread into prepared pan.
  • BAKE 20 to 25 minutes or until puffed and light golden brown. Cool completely.
  • Mix all ingredients with a hand mixer until smooth. Add more powdered sugar or milk until you reach desired consistency and spread on top of bars.


Calories: 201kcal | Carbohydrates: 23g | Protein: 5g | Fat: 11g | Saturated Fat: 2g | Trans Fat: 1g | Cholesterol: 20mg | Sodium: 189mg | Potassium: 124mg | Fiber: 1g | Sugar: 16g | Vitamin A: 228IU | Vitamin C: 1mg | Calcium: 50mg | Iron: 1mg