The frosting is made with butter, cocoa powder, milk, and powdered sugar, but there is one important rule you have to follow for the best Texas sheet cake: Pour the frosting over a warm cake.

5. Bake tart in preheated oven until golden brown, rotating pan halfway through, 30 to 35 minutes. Cool on pan on a wire rack, 1 hour. Whisk together powdered sugar, 2 tablespoons heavy cream and ...

The frosting comes together in 10 minutes using chocolate, butter, powdered sugar, cocoa powder, a little bit of heavy cream, and salt. For a printable recipe card, visit the original chocolate ...