Double Graham Chocolate S'more Bars

You know what's better than a S'more? Double Graham Chocolate S'more Bars. Holy heaven, don't even ask how I came up with this. I was playing around with coconut bars and it turned into a giant S'mores sheet and I just went with it. Seriously, so good. If you have a sweet tooth you will like these bars. I promise. 

Double Graham Chocolate S'more Bars

Ingredients
6 cups finely ground graham crackers
1/2 cup granulated sugar
1 1/2 cups (3 sticks) unsalted butter (melted)
1 cup semisweet chocolate chips
1/2 cup chopped walnuts
1 can (14 oz) sweetened condensed milk
1 bag mini marshmallows

Directions
1. Preheat your oven to 375 degrees and line a 15"x10" rimmed baking sheet with parchment paper so the parchment paper is slightly sticking up on the edges (this makes it easier to lift the bars out once they are cooled.) Prepare another 15"x10" baking sheet by spraying this one with non-stick spray. This one will hold the "graham cracker topping cumble".

2. In a large bowl, stir together graham cracker crumbs, sugar, and butter until well combined.

3. Split the mixture and press half of the mixture onto the bottom and up the sides of prepared baking sheet with parchment paper. Press the other half down on the other baking sheet. Bake both sheets, rotating 5 minutes through, until firm, about 8-10 minutes.

4. Set non parchment lined crust aside (as this will be used as a crumble) and sprinkle the other crust (on the parchment paper) evenly with chocolate chips and chopped walnuts.

5. Pour condensed milk over the top of the chocolate chips, spreading to cover completely with a spatula. Sprinkle with mini marshmallows and crumble the remaining graham cracker crust over the top of the marshmallows.

6. Bake at 375 degrees until marhsmallows melt, about 5 minutes. Make sure they do not burn. Transfer to rack and cool completely. Cut into equal-size bars and store in refrigerator.