Cream together butter and sugars until fluffy.
Add eggs and vanilla, beat until combined.
Mix in dry ingredients until just combined.
Fold in chocolate chips and graham cracker pieces.
Scoop dough into balls, chill for 30 minutes.
Preheat oven to 350°F.
Flatten dough balls, place marshmallow in the center, and encase marshmallow completely.
Bake for 12 minutes.
Let cool before indulging in gooey, chocolaty bliss!