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Preheat the oven to 350 degrees.
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Spray a pie plate with non-stick cooking spray and set it aside.
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Place the graham crackers in a large Ziploc bag and seal it. Then using a rolling pin, crush the graham crackers into fine crumbs. You can also use a food blender if you prefer.
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Place the crumbs into a medium-sized bowl and add in the butter, cinnamon, and brown sugar. Combine the ingredients together. Press the crust mixture into the pie plate.
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Put the pie plate into the oven and bake until the crust is done. Approximately 8 to 10 minutes.
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In a large mixing bowl, combine the whipped topping, vanilla extract, ice cream, lemonade concentrate, a few drops of lemon flavoring oil or extract, and mix everything together. Spread into the prepared pie crust.
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Smooth out and place into the freezer and allow the pie to set. This will take 4 to 6 hours.