Pecan Pie Cobbler

Ingredients :

1 Box refrigerated pie crusts, softened as directed on box
2 1/2 cups light corn syrup
2 1/2 cups packed brown sugar
1/2 cup butter, melted
4 1/2 teaspoons vanilla
6 eggs, slightly beaten
2 cups coarsely chopped pecans
Butter-flavor cooking spray
2 cups pecan halves
Vanilla ice cream, if desired