Gooey Butterscotch Bars

1 package (17.5 ounces) sugar cookie mix
1 package (3.4 ounces) instant butterscotch pudding mix
1/2 cup butter, softened
1 egg
1 package (14 ounces) caramels
1/2 cup evaporated milk
2 cups mixed nuts
1 teaspoon vanilla extract
1 cup butterscotch chips

In a large bowl, combine the sugar cookie mix, pudding mix, butter and egg. Press into an ungreased 13x9-in. baking pan. Bake at 350 for 20-25 minutes or until set.

In a large saucepan, combine the caramels and milk. cook and stir over medium-low heat until melted. Remove from heat. Stir in nuts and vanilla.

Pour over crust. Sprinkle with butterscotch chips. cool completely. Cut into bars. Store in an airtight container.