To prepare a vegan chocolate cupcakes with vanilla frosting recipe, first you need to prepare the cupcake batter. Preheat the oven to 350 degrees F (180 degrees C) and line cupcake liners with cupcake paper. Fill each cupcake liner with the batter and bake for 18 to 20 minutes or until the toothpick inserted in the center comes out clean. Allow to cool before frosting.