Begin by combining the dry ingredients in a bowl. Do the same with the wet ingredients. Pour the wet ingredients into the chocolate cake mix. Add to 2 cake pans sprayed with coconut oil. Bake in a 325 degree oven for 12 - 14 minutes. The cake is done when a toothpick stuck in the center comes out clean. Remove from oven and let cool.
Beat the butter until fluffy in a stand mixer. Add the confectioner sugar one cup at a time. Mix until combined, and then, add one tbsp of the coconut milk. Next, add the peppermint extract.
Continue by adding one cup of the sugar and one tbsp of the coconut milk. After all the sugar is added, check the consistency to see if you need the last tbsp of milk or need more sugar.
Take one layer of the cake and using an offset spatula and cover the top. Next, add the 2nd cake layer and spread the remaining from on top and the sides. The final step is to shave some chocolate on top of the cake.
Serve and enjoy!