Preheat the oven to 375°
In a medium mixing bowl, combine crumbs and butter and stir to combine.
In a 13x9-inch baking pan (ungreased) take crumb mixture and press it into the pan firmly. Bake for 8 minutes and take out of the oven and turn the oven down to 350°
Meanwhile, in a sauce pan over low heat melt 1 cup of the chocolate chips and sweetened condensed milk together. Once chocolate chips are melted take off heat. Add vanilla. Stir to combine.In a small bowl take the remaining 1 cup of chocolate chips and chopped nuts and stir together. Spread chocolate/sweetened condensed milk over cooked graham cracker crumbs. The take the chocolate chip/nut mixture and spread on top of that and press down firmly.
Bake 25-30 minutes in the 350° oven. Cool. Chill, if desired. Cut into square bars. Store loosely covered at room temperature or in the refrigerator.HAPPY EATING!!