Peanut Butter Cake Recipe (Easy!)

A square piece of peanut butter cake on a white plate topped with chocolate frosting and chopped peanut butter cups.

5 from 52 votes

This easy peanut butter cake starts with a cake mix, and is the easiest way to make a delicious peanut butter cake! It's a peanut butter lovers dream, it's so moist, and delicious!

Course: Dessert

Cuisine: American

Keyword: Cake mix, Easy, peanut butter cake

Servings:

Calories: 448kcal

Equipment

Large Mixing Bowl

Ingredients

15.25 oz boxed yellow cake mix (can substitute a white cake mix)
1 1/4 cup milk
1/3 cup vegetable oil
1/2 cup creamy peanut butter
3 large eggs
2 cups frosting (chocolate or peanut butter are great)
1 cup chopped peanut butter cups

Instructions

Preheat the oven to 350 degrees Fahrenheit. Grease a 9x13 pan with nonstick spray.
Add all the ingredients to a large bowl and stir them together until combined. Continue mixing the mixture for 1-2 minutes.
Pour the mixture into the prepared cake pan and smooth the top evenly.
Place the cake in the preheated oven and bake for 25-30 minutes, or until a toothpick inserted in the middle comes out clean, or with a few moist crumbs.
Remove the cake from the oven and let it cool completely.
Frost the cake with your choice of frosting. Sprinkle chopped peanut butter cups over the top of the frosting if desired.

Nutrition