Peanut Butter Cupcakes with Peanut Butter Frosting
Cook time
Total time
Serves: 20 Cupcakes
  • ⅓ cup creamy peanut butter
  • 1 cup water
  • ½ cup unsalted butter, room temperature
  • 1 cup granulated sugar
  • 1 cup brown sugar
  • 2 cup flour
  • 1 teaspoon salt
  • 1 teaspoon baking soda
  • 2 eggs
  • ½ cup buttermilk
  • 1 teaspoon vanilla
  • ¾ cup unsalted butter, room temperature
  • ½ cup creamy peanut butter
  • 3½ cups powdered sugar
  • 1 tablespoon vanilla
  • 4 tablespoons of buttermilk, plus 1-2 more if needed
  • crushed peanut butter cookies, for garnish (optional)
  1. Preheat your oven to 375 degrees F. In a sauce pan over medium heat, melt together the peanut butter, water, and butter until smooth. Set aside. In a large mixing bowl, whisk together the granulated sugar, brown sugar, flour, salt, and baking soda. Add the melted peanut butter mixture to the flour mixture and beat until just combined. In one more small bowl, whisk together the eggs, buttermilk, and vanilla, then add it to the flour and peanut butter mixture, beating until just combined (do not overmix).
  2. Grease and/or line your muffin cups, then pour just under ¼ cup of batter into each cup (or 2½ teaspoons of batter if you're making mini cupcakes, in which case I recommend halving the whole recipe). Bake for 15-17 minutes for the regular size cupcakes for 8-10 minutes for mini cupcakes. Allow to cool completely before frosting (recipe follows). Makes about 20 regular cupcakes or about 30 mini cupcakes.
  1. Cream the butter in a mixing bowl for about 3 minutes, then add in the peanut butter and cream that with the butter for another minute or so. Add in the powdered sugar and beat together using the lowest speed on your mixture until incorporated. Add in the vanilla, then the buttermilk, one tablespoon at a time, until the desired consistency has been reached. Beat together on high speed until light and fluffy. Frost onto the cooled peanut butter cupcakes and top with the crushed peanut butter cookies, if desired.
Recipe by The Crepes of Wrath at