Make cake regularly as your cake directions say to
Pour batter into the cupcake pan and crush graham cracker and lay on top of batter gently and insert into the oven
Finely grind up 6 graham crackers until a dust like texture. Mix into the frosting. Amount of graham crackers used depend on amount of frosting made.
Mix graham cracker into frosting
When cupcakes come out of the oven, they should look something like this. Let the cupcakes cool COMPLETLEY
Fill pastry bag with the marshmallow fluff
Take an apple corer and take out the center of the cupcakes, be careful; DO NOT GO ALL THE WAY THROUGH THE CUPCAKE
Fill the cupcakes holes with the marshmallow fluff
Place the frosting in a frosting bag and frost the cupcakes
Decorate and enjoy!