Preheat oven to 375 degrees F.
Add the vinegar to the dairy free milk and let mixture sit for 5 minutes
Add the almond flour, buckwheat flour, coconut sugar, baking powder, baking soda and charcoal to a large bowl and stir to combine
Next, add the apple cider vinegar/milk mixture, eggs, and vegetable oil to the dry ingredients. Stir the wet ingredients into the dry.
Grease and flour a cake pan
Add the cake batter to the cake pan and place in the oven
Bake for 40-50 minutes or until the cake is baked through
Allow the cake to cool before taking it out of the pan
After the cake is cooled and removed from the pan, top with frosting of choice and enjoy!