Preheat oven to 350 degress.
Grease a 9x13 pan and set aside.
In a medium bowl. stir together ingredients for the crust and press into prepared pan in an even layer. Bake for 12 minutes.
In a large bowl combine first 8 brownie ingredients and stir to combine. Pour over crust and sprinkle with chocolate chips.
Bake for 20 minutes or just until set. Remove for oven and top with marshmallows . Place under broiler for a couple of minutes and be sure to watch them closely.
Let brownies cool completely before serving.