Directions

1. Preheat the oven to 350°F. Line a 9×9-inch baking pan with parchment paper.
2. Whisk together flour, oats, baking soda and salt in a medium bowl.
3. In a large bowl, beat together butter and brown sugar until light and creamy. Add vanilla extract and mix to combine. Add dry ingredients to the bowl and mix until a crumbly mixture forms.
4. Press 2/3 of the mixture into the prepared pan. Sprinkle chocolate, marshmallows and graham crackers over the crust and gently press down. Top with remaining cookie mixture.
5. Bake for 25-30 minutes or the top is golden brown.
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