Preheat oven to 350°F. Line two baking sheets with parchment paper or silicone baking mats and set aside.

Combine the flour, cocoa, baking soda and salt in a medium bowl. Set aside.

In the bowl of a stand mixer, beat the butter, shortening and sugars, until light and fluffy. Add in the egg and vanilla.

Gradually add in the flour mixture on low speed. Stir until dough forms. Then stir in mallow bits, graham crackers and mini chocolate chips by hand.

Create large cookies by scooping 2 scoops of dough together and rolling into a ball. Place onto baking sheet, then top with 2-3 chunks of chocolate and more marshmallows. Gently flatten cookie dough (to form a disk shape) using the bottom of a glass.

Bake 12 minutes and remove from oven. Let cool for 5 minutes before transferring cookies to a wire rack to cool completely.

Note: Cookies will not spread too terribly much at all and will look like they are not done baking. But I promise they are! Once they finish cooling, the cookie and chocolate will become firm and you will have a magically soft and crumbly cookie!

*Mallow Bits {by Jet Puffed} are available at Target and Walmart.