Chocolate sheet cake with peanut butter frosting - Recipe Tweets

Ingredients

• 1 cup unsalted butter
• 1 cup water
• 1/2 cup unsweetened cocoa powder
• 2 cups all-purpose flour
• 1 teaspoon baking soda
• 1/4 teaspoon salt
• 2 large eggs, at room temperature
• 1 cup granulated sugar
• 1/2 cup packed light or dark brown sugar
• 2 teaspoons pure vanilla extract
• 1/2 cup buttermilk
• 1 1/2 cups creamy peanut butter
• 1/2 cup unsalted butter, softened
• 3 cups confectioners' sugar
• 1/2 cup heavy cream or milk
• pinch salt
• 1/2 cup chopped peanut butter cups or chocolate candies, optional