Add Butter and mix together until fully combined. Scrape down sides and bottom of the bowl.
Add Powdered Sugar Slowly until combined. Scrape down sides and bottom of the bowl.
Add Extracts and 2 Tbsp Coconut Milk. Mix on Med-High.
Check consistency. Frosting should be stiff enough to pipe, but not tough. Add extra Coconut Milk by the Tbsp until consistency is light, fluffy, but pip-able. It should create a stiff peak when a spatula is pulled up through the bowl of buttercream.
Frosting can be stored tightly covered in the fridge for up to 5 days.
Unsalted butter can be substituted for salted butter. Just add a small pinch of salt.