Mix the peanut butter, chocolate chips, rice milk, Earth Balance and vanilla together in a bowl (well, microwave-safe Tupperware container).
Microwave for 30 second intervals until everything is melted. You could also do this on the stove, but I opted for the microwave since the hot plate in my kitchenette takes forever to heat up.
Mix everything together well and add the cocoa powder and confectioner's sugar.
Crush the nuts with a cup and add those in as well.
Rip up the vegan marshmallows into bite-sized pieces and mix them in too.
Once everything it combined, pour it all into a square pan or Tupperware and refrigerate at least one hour before eating. Mmmm.