Double-Decker Fudge

Butter an 8-inch square pan and set aside. Put peanut butter chips in one medium bowl and chocolate chips into another. In a large heavy saucepan over medium heat combine sugar, marshmallow creme, evaporated milk and butter. Stir constantly until mixture boils and then continue to stir while boiling for 5 minutes. Remove from heat and stir in vanilla. Pour half of this mixture into the peanut butter chips, stirring both until chips are completely melted. Pour into prepared pan. Pour other half of milk mixture into the chocolate chips, stirring until chips are completely melted. Immediately spread over peanut butter layer. Cool and cut into 1-inch squares.