Preheat oven to 350℉. Butter deep baking dish with butter, set aside.
Unroll one pie crusts and lay it evenly in the bottom of dish, gently pressing to sides of dish. Top with chocolate chips.
In a large bowl, combine brown sugar, corn syrup, butter, vanilla and eggs. Mix well. Fold in chopped pecans.
Pour half of the mixture into the pan. Unroll the second crust and evenly layer it on top of the mixture, again, gently pressing the sides to the side of pan. Bake for 20 minutes.
Remove from oven and top with the remaining mixture. Decorate the top with pecan halves. Bake an additional 30 minutes or until it looks set.
Cool at least 15 minutes. Serve with vanilla ice cream.
