This triple coconut cake is a scrumptious dessert for any occasion. The cake batter is made with three different types of coconut flavoring: coconut extract, coconut milk, and shredded coconut (so there is no mistaking the flavor!). A homemade coconut buttercream, using those same coconut flavorings, is used to frost the cake. If you want to get fancy, you can slice the cakes in half lengthwise (very carefully) and brush each side with coconut rum. Triple coconut cake is the perfect dessert for die-hard coconut fans.