Preheat your oven to 350 degrees.

Heavily grease a mini muffin tin and set aside.

Using a 2 1/2 inch circle cookie cutter, cut out 24 pie crust circles. Put the pie crusts inside the muffin tin.

Combine the crushed graham crackers and the melted butter. Add approximately 1/2 tsp of crumbs to each hole. Top each one with a mini peanut butter cup.

Bake them for 16 minutes.

Remove the pan from the oven and top the mini pies with a few mini marshmallows each, enough to cover the mini pie. Turn the oven to broil and cook for 2 minutes or until the marshmallows are lightly toasted.

Allow the mini pies to cool for about a minute or two and then remove them from the pan, using a sharp knife if necessary.