1 (12 oz.) pkg. chocolate chips
1/3 c. butter
2 c. graham cracker crumbs
1 c. chopped nuts
1 (8 oz.) pkg. cream cheese
1 (14 oz.) can sweetened condensed milk
1 tsp. vanilla
1 egg

Preheat oven to 350 degrees. In medium saucepan, melt morsels and butter; stir in crumbs and nuts. Press half the mixture firmly onto bottom of greased 13"x9" baking pan. In large mixer bowl, beat cheese until fluffy; beat in sweetened condensed milk, vanilla and egg; mix well. Pour into prepared pan. Top with remaining crumb mixture. Bake 25 minutes or until toothpick comes out clean. Cool, chill before cutting. Refrigerate leftovers.