In a medium sized bowl mix graham cracker crumbs, powdered sugar and butter with a spoon
Evenly spoon the mixture to the 24 mini muffin cups. Press along the bottom and sides to make a cup.
Bake for 5 minutes
While they are baking cut 12 large marshmallows in half.
Remove the pans from the oven and place one piece of the Hershey bar in the graham cracker cup and cover with 1/2 of marshmallow (cut side facing down).
Turn your oven on broil
Put the pan back in and broil for 1-2 minutes (WATCH THEM!!) Take them out as soon as they start to brown. (I like mine light brown so I only did a minute)
Let cool and take out of the pan when you are ready to eat!