In a small bowl, combine flour, sugar and salt.

Cut in 1/2 cup butter until mixture resembles course crumbs.

Press into a greased 13 X 9 inch baking pan.

Bake at 350°F for 10 minutes.

Sprinkle with the nuts.

In a microwave, melt butterscotch chips and remaining butter at 70% power for 1 minute.

Stir.

Microwave at additional 10 to 20 second intervals, stirring until smooth.

Stir in corn syrup.

Pour over nuts.

Bake for 10 minutes or until set.

Cool in pan on a wire rack.