Preheat oven to 350 degrees F. Grease three large baking sheets. Set aside. In a large bowl, add the flour, baking soda, baking powder, salt, pumpkin pie spice, cinnamon, and graham cracker crumbs. Whisk to blend together. Set aside.
Mix the melted butter and both sugars together in a large bowl. Add in vanilla, pumpkin and egg. Mix until just combined. Mix the dry ingredients into the wet ingredients just until combined. Stir in chocolate chips.
Scoop the dough using a large cookie scoop (about 4 Tablespoons worth of dough) onto the prepared baking sheets. 6 cookies per sheet. Press the dough down slightly with your hands. Bake for 13 to 14 minutes. Carefully remove from oven.
Place two marshmallow halves onto each cookie. Place back into the oven for 1 minute or until marshmallows have slightly melted. *Watch closely so they don't burn.* Carefully remove from oven. Let cookies cool on the baking sheets. Serve and enjoy!