These chocolate coconut cupcakes can be prepared a couple of days in advance, and so can the frosting. For best results, store the unfrosted cupcakes on the kitchen counter, in an airtight container; before sealing the container, ensure they have fully cooled down. Should you decide to prepare the indulgent buttercream in advance too, remember this will harden in the fridge, so you will need to take it out a couple of hours before using it; once it reaches the ideal consistency, whisk it for a few minutes to bring back that creamy frosting result.