Pour coconut milk in a saucepan on stovetop. Place chocolate chips in a heatproof bowl and place over coconut milk. This will act as a double boiler (or use a double boiler if you have one). Heat on medium heat until coconut milk comes to a simmer, and chocolate chips are melted slightly.
Remove both from the heat, and pour coconut milk over chocolate chips to finish melting. Mix until smooth.
Add cinnamon, nutmeg, cayenne pepper, vanilla extract, and salt. Mix thoroughly. Pour into an 7 ½" x 9 ½" glass baking dish, or similar size. Cover and put in the refrigerator to set.
Once mixture is set, use a melon baller, spoon, or ice cream scoop to form balls. Roll balls in your hands, then into cacao powder. Refrigerate.
Notes
These vegan truffles will last up to 5 days in an airtight container in the fridge or up to 3 months in the freezer.