An easy recipe for coconut sheet cake from Southern Living involves combining white cake mix with cream of coconut, sour cream, eggs and vanilla extract to make a batter. It features a cream cheese frosting with sweetened flaked coconut. This recipe receives good ratings and reviews on MyRecipes.com.
To make the coconut cake, beat 3 large eggs with an electric mixer on the high speed setting for two minutes. Gradually incorporate 8 ounces of sour cream, 1/3 cup of water, 8.5 ounces of cream of coconut and 1/2 teaspoon of vanilla extract. Beat in 18.25 ounces of white cake mix at low speed before switching to the high speed setting again to process everything thoroughly for two minutes.
Transfer the batter into a prepared 9-by-13-inch baking pan, and bake it at 325 degrees Fahrenheit for 40 minutes or until a toothpick inserted into the center of the cake emerges clean. Allow the cake to cool in the pan at room temperature before covering it with plastic wrap and placing it in the freezer for 30 minutes.
To prepare the frosting, thoroughly blend 8 ounces of softened cream cheese and 1/2 cup of softened butter with an electric mixer set at medium speed. Beat in 3 tablespoons of milk and 1 teaspoon of vanilla extract before progressively incorporating 16 ounces of powdered sugar. Fold in 7 ounces of sweet coconut flakes. Retrieve the cake from the freezer, and slather the frosting on top of the cake.