Base layer:
Combine flour, sugar, butter. Pat firmly into ungreased
9x13 baking pan
. Sprinkle pecans over unbaked crust.
Caramel layer:
Combine butter, sugar. Cook, stirring constantly, until entire surface of mixture begins to boil. Boil 30 seconds - 1 minute, stirring constantly. Pour evenly over crust.
Bake crust + caramel layer at 350ºF for 18 - 22 minutes or until caramel layer is bubbly and crust is light golden brown.
Topping:
As bars cool, top with chips, swirled slightly for marbled effect. Do not spread. Scatter pecan halves on top. Makes 3 - 4 doz. bars.