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Peanut Butter M&M’s Cake

A moist, peanut butter packed cake layered with fluffy peanut butter frosting and topped with colorful M&M’s for a fun, festive finish.

Ingredients
  

For the Cake

  • All purpose flour
  • Baking powder
  • Baking soda
  • Salt
  • Unsalted butter at room temperature
  • Creamy peanut butter
  • Granulated sugar
  • Eggs at room temperature
  • Vanilla extract
  • Buttermilk
  • M and Ms

For the Frosting

  • Unsalted butter at room temperature
  • Creamy peanut butter
  • Powdered sugar
  • Heavy cream
  • Vanilla extract
  • Extra M and Ms for topping

Instructions
 

  • Grease and flour two 9-inch round cake pans; set aside.
  • Whisk flour, baking powder, baking soda, and salt together.
  • Beat butter and peanut butter until smooth and creamy.
  • Gradually add sugar, then mix in eggs one at a time.
  • Stir in vanilla extract.
  • Alternate adding the dry ingredients and buttermilk, beginning and ending with the dry mix.
  • Gently fold in the M&M’s.
  • Divide batter between pans and bake at 350°F for 25–30 minutes.
  • Cool cakes 10 minutes in pans, then transfer to a rack.
  • Make frosting by beating butter and peanut butter, then adding powdered sugar, cream, and vanilla.
  • Assemble the cake and frost the top and sides.
  • Decorate with extra M&M’s.