Filling:
3/4 cup sugar
1 cup sour cream
4 tablespoons milk
1/2 cup flaked, sweetened coconut

7-Minute Frosting:
1 1/2 cups sugar
1/4 teaspoon cream of tartar or 1 tablespoon white corn syrup
1/8 teaspoon salt
1/3 cup water
2 egg whites
1 1/2 teaspoons pure vanilla extract
2 to 3 cups coconut, flaked and sweetened 

Cake:Preheat oven to 350 degrees F. Grease and flour 3 (9-inch) cake pans.
Using an electric mixer, cream butter until fluffy. Add sugar and continue to cream well for 6 to 8 minutes. Add eggs, 1 at a time, beating well after each addition. Add flour and coconut milk alternately to creamed mixture, beginning and ending with flour. Add vanilla and continue to beat until just mixed. Divide batter equally among prepared pans. Level batter in each pan by holding pan 3 or 4-inches above counter, then dropping it flat onto counter. Do this several times to release air bubbles and assure you of a more level cake. Bake for 25 to 30 minutes or until done. Cool in pans 5 to 10 minutes. Invert cakes onto cooling racks.

Cook’s Note: As each layer is stacked, stick them with toothpicks to prevent cake from shifting.