Layer 1: 1 cup flour, 1/2 cup melted butter, and 1/2 cup chopped nuts. Mix and press into 9 x 13 inch pan. Bake for 15 minutes; cool.

Layer 2: 8 ounce package cream cheese (softened), 1 cup powdered sugar, 1 cup Cool Whip, and 1 teaspoon vanilla. Mix and spread over Layer 1.

Layer 3: 2 packages instant butterscotch pudding, 3 cups milk, and 1 teaspoon vanilla. Whip and spread over Layer 2.

Layer 4: Spread top with Cool Whip and sprinkle with nuts. Refrigerate 8 to 10 hours.