1. Heat oven to 350°F. Lightly grease 13x9x2-inch baking pan.
2. Beat butter and sugar in large bowl on medium speed of mixer until well blended. Add eggs and vanilla; beat well. Mix in applesauce. Stir together flour, cinnamon, baking soda and salt; gradually add to butter mixture, beating until well blended. Stir in butterscotch chips and pecans, if desired. Spread in prepared pan.
3. Bake 35 to 40 minutes or until wooden pick inserted in center comes out clean. Cool completely in pan on wire rack. Sprinkle with powdered sugar or serve with whipped topping, if desired. 12 to 16 servings.