In a bowl, cream the butter and sugars until light and fluffy. Beat in the eggs and vanilla. Combine the flour, graham cracker crumbs, baking soda and salt to mixture. Stir in chocolate chunks.
Using a tablespoon, drop the dough 2 in. apart onto ungreased baking sheets. Bake at 375° for 8 min. Cool.
Add a smear of (about a tablespoon) of marshmallow fluff to the bottom of one S’more Cookie and sandwich it with the bottom of another…Voila! You have a S’mores Cookie Sandwich! I suggest you freeze these and keep them in a cooler to thaw prior to serving at your campfire soiree!