Preheat the oven to 175C/346F.
Grease and flour a round baking pan.
Mix the dry ingredients (flours, baking soda and baking powder, cacao powder, salt) into a large bowl, then add the wet ingredients and mix to combine.
Transfer the mixture into the baking pan and bake for 40 minutes (use a toothpick to check, if you insert it in the cake and it comes out clean, it's ready!).
Remove from the oven and set aside to cool into the pan, before removing.
Meanwhile, prepare the chocolate frosting.
Heat the almond milk into a medium sauce pan over medium heat.
Add the coconut oil and dark chocolate, turn the heat to low, and stir until the chocolate melts completely.
Remove from the heat and set aside to cool.
Refrigerate for 20 minutes, then remove and spread it over the chocolate cake.