Preheat your oven to 350 degrees F.
Cream the softened butter with the granulated sugar and brown sugar until light and fluffy.
Add the eggs, one at a time and blend.
Add the vanilla extract and blend.
Add 1 cup of the flour along with the baking soda and salt and blend.
Add the remaining 5 cups of flour and blend slowly until all the flour is incorporated.
Add the chocolate chips and blend slowly until evenly distributed throughout the dough.
Add the graham crackers and fold in gently.
Prepare cookie sheets by covering with silicone baking mats.
Use a large or medium-sized cookie scoop to scoop out the dough. Place three frozen marshmallows inside each scoop. Make sure the marshmallows are completely encased in the dough.
Place on cookie sheets far apart from one another.
Bake at 350 degrees F. for 10-12 minutes, until the edges just start to brown.
Allow to remain on the cookie sheet for five minutes before transferring to a wire rack to cool completely.