From The Picky Palate Cookbook by Jenny Flake.
Ingredients:One 18.25 ounce box devil's food cake mix
2 large eggs
1/4 cup packed light brown sugar
8 tablespoons (1 stick) unsalted butter, melted
3 1.55 ounce Hersey's chocolate bars, cut into rectangles
1 1/2 cups mini marshmallows
1 1/2 cups roughly chopped graham crackers
Preheat the oven to 350 degrees F and line a baking sheet with parchment paper or a silicone liner.
Add the cake mix, eggs, brown sugar and butter to a large bowl and mix until combined. With a medium cookie scoop, place the dough onto the prepared baking sheet, 1 inch apart. Press the cookies to flatten to about 1/2 inch thick. Press a chocolate bar piece, 2 marshmallows and 2 graham cracker pieces on top of the flattened cookie dough. Bake for 11 to 13 minutes, until cooked through. Let cook for 5 minutes before transferring to a cooling rack.