Lie a 13 x 9 x inch pan with foil. Place 1 cup peanut butter chips in medium bowl; set aside. Melt 1/4 cup butter; cool slightly. In second medium bowl, blend melted butter, cocoa and vanilla until smooth; add 1 cup peanut butter chips. Combine sugar, marshmallow creme, evaporated milk and 1/4 cup butter in heavy 4 quart saucepan. Cook, stirring constantly over medium heat until mixtures comes to a rolling boil; boil and stir 5 minutes. Remove from heat. Immediately add half (about 3 cups) of hot mixture to peanut butter chips. Pour remainder into cocoa mixture; stir to blend. Beat peanut butter mixture until chips are completely melted. Immediately spread evenly in prepared pan. Beat cocoa mixture until chips are melted and mixture begins to thicken. Spread evenly over top of peanut butter layer; cool. Remove from pan; remove foil. Cut into 1 inch squares. Store in airtight container in a cool, dry place.
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