Best Cookie Bars

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I got this recipe years ago from my sister-in-law. They are sooo good i don't make them very often as they are to tempting. Every time i make them everyone wants the recipe. This recipe consists of 3 layers.

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Steps

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Mix butter , flour and sugar until crumbly.

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Pat into a 9 x 13 pan and bake for 10 minutes at\\375.

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Mix graham crackers , baking powder , chocolate chips , nuts and condensed milk and spread over crust.

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Bake for 25 minutes at 325.

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Mix butter , powdered sugar and vanilla and frost when cool.

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Ingredients

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butter, flour, sugar, graham cracker crumbs, baking powder, chocolate chips, walnuts, sweetened condensed milk, powdered sugar, vanilla