Two Bowl Method:Bowl 1: mix together flour, baking powder, baking soda, salt.Bowl 2: Cream butter. Add in sugar. Mix well. Add vanilla. Mix. Add eggs whites. Mix in sour cream and coconut milk. Mix tother: Add flour mixture to sugar mixture. Mix well. Add in coconut.Pour into 2 8-inch greased pans. Bake in a preheated 350 F oven for 25-30 minutes. Cake should spring back when you press finger lightly in middle of cake.Cool before frosting.Make frosting. Use a spatula to spread frosting on each layer.