Combine cake mix and can of soda together, mix well.
Divide batter among cupcake liners.
Bake 15 to 18 minutes, until toothpick inserted in the center of cupcake comes out clean, in a 350 degree oven.
As soon as cupcakes are done, turn oven broiler on, top each cupcake with a heaping tablespoon of marshmallow creme and place under broiler until the marshmallow is slightly toasted.
Nutrition values are estimates, for exact values consult a nutritionist.