Lightly flour a flat surface and place pie crusts into a 15 x 10 jelly roll pan. Place one pie crust into the pan and trim the edges to fit, adding any leftover crust to the edges of the pan. Trim the other crust to fit into the pan to fill the void spaces. Press seams together with fingers.

Sprinkle pecans evenly over crust.

Add brown sugar, corn syrup and butter to a saucepan and heat over medium heat, stirring constantly until smooth and almost bubbling. Remove from heat and add butter, eggs and vanilla and mix well. Pour over pecans.

Bake for 35-40 minutes or until center is set. Let cool completely before cutting into squares.