- Place both the can and carton of coconut milk in the fridge for at least 24 hours. 
- Also, place your mixing bowl and whisk in the fridge at least 10 minutes before you start the frosting. This will help whip the coconut cream. 
- For the can of coconut milk, open it from the bottom, drain the liquid and spoon the coconut cream into your mixing bowl. 
- Open the carton of coconut milk, and spoon the coconut cream from the top to your mixing bowl. See notes if the coconut cream did not separate. 
- Mix the coconut cream at medium-high speed with your stand mixer for about 3 minutes. 
- Add 4 tablespoons of icing sugar to start, and mix on medium-high speed. Add more icing sugar, if desired (to taste). Mix on high speed until the frosting stiffens. 
- If the frosting is too stiff, add some of the liquid in the carton of coconut milk, one tablespoon at a time, then mix on high speed. Keep adding liquid until you reach your desired frosting softness. 
- Finally, add the vanilla extract, then mix. 
- If you want, you can add matcha powder to the frosting to have matcha coconut frosting. Keep in the fridge until ready to use.