Preheat oven to 350 degrees.
Spray your 13×9 pan with nonstick spray.
With mixer, combine butter and cream cheese; slowly add the sugar and the egg.
Add the flour, baking soda and vanilla.
Place the crust in the 13×9 pan and press evenly to bottom and sides.
Bake 15 minutes while preparing filling.
Pecan Filling: In saucepan, combine butter, brown sugar, corn syrup.
Cook over medium heat until all melted; increase temperature and bring to a boil.
Pour over hot crust.
Return to oven and bake 20 minutes.
Let cool and cut into squares.