Peanut Butter Sheet Cake

Ingredients (18)

• Peanut butter cake:
• 2 cups (9 1/4 oz) all purpose flour
• 2 teaspoons baking powder
• 1/4 teaspoon salt
• 1/2 cup brown sugar
• 1/2 cup granulated sugar
• 3/4 cup creamy peanut butter
• 1/2 cup vegetable oil
• 2 teaspoons vanilla extract
• 2 large eggs
• 3/4 cup whole milk
• Peanut butter frosting:
• 3/4 cup (1 1/2 sticks) unsalted butter
• 3/4 cup creamy peanut butter
• 1 1/2 cups powdered sugar
• 1/2 teaspoon salt
• 1 teaspoon vanilla extract
• Chocolate shavings