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A bowl of smooth, creamy homemade peanut butter frosting with a light tan color and swirled texture, ready to spread over cakes, cupcakes, or brownies.

Homemade Peanut Butter Frosting

Easy Homemade Peanut Butter Frosting made with butter, creamy peanut butter, powdered sugar, and vanilla. Silky, fluffy, and perfect for cakes, cupcakes, brownies—or a spoon.
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Prep Time 10 minutes
Total Time 10 minutes
Servings: 12
Course: Dessert
Cuisine: American
Ingredients Equipment Method Notes

Ingredients
  

  • 1 cup 2 sticks unsalted butter, room temperature
  • ¾ cup creamy peanut butter
  • 2 –3 cups powdered sugar
  • 1 teaspoon vanilla extract
  • 2 –3 tablespoons heavy cream or milk as needed

Equipment

  • Mixer, mixing bowl

Method
 

  1. Beat softened butter until light and fluffy, about 2 minutes.
  2. Add peanut butter and vanilla; beat until completely smooth.
  3. Gradually add powdered sugar, 1 cup at a time, beating well after each addition.
  4. Beat until silky and holding soft peaks. Adjust consistency with cream or milk, 1 tablespoon at a time, if needed.
  5. Use immediately to frost cooled desserts, or store covered in the refrigerator.

Notes

Use conventional creamy peanut butter for best texture. Adjust powdered sugar to taste. Re-whip after refrigeration. Excellent on chocolate cake and brownies. Highly spoonable.