Peanut Butter Sheet Cake

recipe from Buns in My Oven

Details

• Prep Time: 20 minutes.
• Cook Time: 15 minutes.
• Ready in 35 Minutes.
• Makes: 24 Servings

Ingredients

• For the Cake :
• 1 1/2 cups granulated sugar
• 1/2 cup brown sugar
• 2 cups flour
• 1 teaspoon baking soda
• 1 teaspoon kosher salt
• 1 1/2 cups milk, divided
• 1 cup creamy peanut butter
• 1 cup butter
• 2 teaspoons vanilla
• 2 eggs
• For the Frosting :
• 1 cup granulated sugar
• 1/3 cup butter
• 1/3 cup milk
• 1/2 cup creamy peanut butter
• 1/2 cup semi-sweet chocolate chips

Directions

• Preheat oven to 400 degrees. Grease bottom only of a rimmed half sheet pan.
• Add both sugars, the flour, baking soda and salt to a large mixing bowl. Using a large whisk, combine well.
• Add 1 cup of the milk, peanut butter and butter to a small saucepan, and bring to a boil, stirring frequently. While this is cooking, combine remaining 1/2 cup milk, vanilla and eggs in a small bowl.
• Remove saucepan from the heat and let sit for a few minutes. Add mixture to the bowl with the sugars and flour. Begin mixing, then add egg mixture and whisk until just combined.
• Spread cake batter into prepared sheet pan and bake for 15 minutes. Cool completely.
• To make the frosting, mix the sugar, butter and milk in a small saucepan over medium heat. Bring to a boil (increase heat if necessary) and boil for exactly 60 seconds.
• Remove from the heat and add peanut butter and chocolate chips. Stir well until thoroughly combined and chocolate is completely melted.
• Pour warm frosting over the cake and spread with a spatula. Frosting will harden as it cools.
• Serve once frosting is cooled and set.