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Peanut Butter Sheet Cake with Peanut Butter Frosting

This rich and moist peanut butter sheet cake topped with creamy peanut butter frosting is a crowd-pleaser for any occasion.
Prep Time15 minutes
Cook Time30 minutes
Total Time45 minutes
Course: Desserts
Cuisine: American
Keywords: air fryer cookies easy recipes, butter swim biscuits easy recipes, cheesey potatoes easy recipe, chicken stirfry easy recipe, easy recipes for dinner, easy recipes ninja creami, food receipt easy recipes
Servings: 12 pieces
Author: Clara

Ingredients

Cake

  • 2 cups all-purpose flour
  • 2 cups granulated sugar
  • 1 tsp baking soda
  • 1/2 tsp salt
  • 1 cup unsalted butter
  • 1 cup water
  • 1/4 cup creamy peanut butter
  • 2 large eggs
  • 1/2 cup buttermilk
  • 1 tsp vanilla extract

Frosting

  • 1/2 cup creamy peanut butter
  • 1/2 cup unsalted butter
  • 1/4 cup milk
  • 3 cups powdered sugar
  • 1 tsp vanilla extract

Instructions

Cake

  1. Preheat the oven to 350°F (175°C) and grease a 9x13-inch baking pan.
  2. In a large bowl, whisk together flour, sugar, baking soda, and salt.
  3. In a saucepan, combine butter, water, and peanut butter. Heat until melted and smooth.
  4. Pour the hot mixture into the dry ingredients and mix well.
  5. Add eggs, buttermilk, and vanilla. Mix until smooth.
  6. Pour the batter into the prepared pan and bake for 25-30 minutes, or until a toothpick comes out clean.

Frosting

  1. In a saucepan, melt peanut butter and butter together.
  2. Remove from heat and add milk, powdered sugar, and vanilla. Mix until smooth.
  3. Spread frosting over the cooled cake.

Notes

This cake is best served fresh but can be stored in an airtight container for up to 3 days.