Unwrap the pie crust, and unroll it. Gently press it into an 8x8" baking dish so that it completely covers the bottom of the dish and reaches about 1" up the sides all around.
Crack both eggs into a large mixing bowl, discard the shells, and whisk the eggs together until well beaten.
Add the flour and sugars to the bowl, and stir together until evenly combined.
Add the softened butter and vanilla extract to the bowl, mixing again until evenly combined.
Fold in the chocolate chips and nuts, if using.
Transfer the cookie batter to the prepared crust, using a spatula to scrape the bowl and to spread it out evenly.
Bake at 325° for 45-50 minutes, or until almost set. If a toothpick inserted to the side of the pie comes out clean, it's done.
Set the pie aside and allow it to cool before using a sharp knife to cut it into bars.
Serve the warm pie bars as is, or topped with a scoop of vanilla ice cream and a drizzle of chocolate sauce.