Butterscotch Cheesecake Bars

I thought about not posting this since it is a family recipe, but it sounded like most of you wanted it...so I caved... :)

1 pkg. (12 oz.) butterscotch chips
1/3 c. margarine or butter
2 c. graham cracker crumbs
1 c. chopped nuts (Walnuts are what I use)
1 (8 oz.) cream cheese softened
1 (14 oz.) can Eagle Brand milk
1 tsp. vanilla
1 egg

Pre-heat oven to 350 degrees. In medium saucepan, melt butterscotch chips and butter. stir in crumbs and nuts. Press 1/2 mixture into greased 9x13 pan. in large mixing bowl, beat cream cheese until fluffy. Beat in milk, vanilla and egg. mix well. Pour over crumbs and top with remaining crumbs. Bake 25-30 minutes or until toothpick comes out clean. Cool to room temperature. Chill before cutting into bars. Refrigerate leftover.