Put the first 2 ingredients into a ramekin/any small oven proof dish thing. Put onto a cookie sheet and then into an oven which is preheating to 350 degrees F (180 degrees C), for 1 minute (just so the coconut oil melts).
Stir in the baking powder and salt, then the flour and cocoa (it's easier if your ramekin/dish has high edges. If it's too hard to mix, just pour the contents into a small bowl, mix and smooth into the ramekin/dish).
Smooth the dough in the dish and scatter over the chocolate chips, pressing them in slightly. Bake for 5-6 minutes, until it has risen slightly, and is still pretty soft in the centre (you really don't want to over-bake it; under-baked is waay better than over-baked in this case). Eat while still warm.