Step 1

Preheat oven to 350 degrees F.

Step 2

Cream butter and brown sugar; add flour and mix until a crumbly dough forms.

Step 3

Press into a 13 x 9 inch baking dish that has been sprayed with nonstick cooking spray.

Step 4

Bake for 10 minutes in preheated oven; remove from oven and spread chopped mixed nuts over top. Set aside while making butterscotch sauce.

Step 5

Melt butterscotch chips, corn syrup, 2 T. butter and water in a double boiler, stirring occasionally until smooth.

Step 6

Pour over mixed nuts, spreading it evenly.

Step 7

Bake for an additional 25 minutes or until the topping is bubbly all the way to the center.

Step 8

Remove from oven and let cool before cutting into bars or squares.