Blend graham crackers, melted butter, and granulated sugar in a food processor until the mixture resembles wet sand. Pour the graham cracker crumbs into your pie or tart pan and firmly press them onto the bottom and side, and freeze.
Chocolate Chip Cookie filling:
In a large bowl cream together the sugars and butter for about 2 minutes on medium-high speed. Then, mix in the egg, yolk, and vanilla extract.
Sift in the dry ingredients and mix until just combined. Fold in the chocolate chips and walnuts. Use your fingers to press the dough into the graham crust and sprinkle with additional chocolate chips.
Optional but recommended: Refrigerate for at least 30 minutes. Bake the chocolate chip cookie pie in the preheated oven for 20-25 minutes or until golden brown.