How do I make Peanut Butter Sheet Cake with Peanut Butter Frosting? Preheat oven to 350°F. Prepare a half sheet pan (18x13") ...

Lightly butter a 9-by-13-inch baking pan ... Bake until sides pull away from edges of pan and a cake tester inserted in center comes out clean, 12 to 14 minutes. Transfer pan to a wire rack ...