Texas Chocolate Sheet Cake with Chocolate-Mocha Frosting Author: Prickly Gourmet Cook time: 25 mins Total time: 25 mins Serves: 1 (9 x 13-inch) cake Ingredients Sheet Cake 2 cups granulated sugar 2 cups all-purpose flour 1 teaspoon baking soda 1 teaspoon cinnamon 1 cup water 1/2 cup butter 1/2 cup vegetable oil 1/4 cup cocoa