Replace part of the water or milk in the cake mix with coconut milk
Stir shredded sweetened or unsweetened coconut into the batter
Fold in toasted coconut for a deeper coconut flavor
Add coconut extract to the batter
Mix coconut into the frosting or use coconut-flavored frosting
Sprinkle shredded coconut on top of the frosted cake
Press toasted coconut onto the sides of the cake
Add coconut between cake layers if making a layer cake
Top with coconut chips or coconut flakes before serving