Preheat oven to 350 degrees. Line your miniature cupcake tin with the liners and spray with cooking spray.

In a large bowl, combine the cake mix, melted butter and beaten egg. Stir until completely mixed together; it will be texture of playdough.

Roll batter into 24 balls and place one ball in each cupcake liner. Gently press one Rolo candy into the center of each dough ball.

Bake on center rack of oven for 10 minutes. Remove tin from oven and evenly place 1 Teddy Graham and 3 miniature marshmallows on top of each cupcake, pressing lightly to adhere to top.

Return to oven for 2-3 more minutes. Remove from oven and allow to cool for at least 10 minutes in tin before removing to wire rack to continue cooling. Serve with plenty of cold milk for sipping!