1. Line an 8-inch square pan with foil, extending foil over edges. Lightly butter foil.
2. Melt chips in large saucepan over very low heat, stirring until smooth. Remove from heat; stir in frosting. Add marshmallows and mixed nuts (or chopped walnuts, if using); mix until well coated. Spread in buttered foil-lined pan. Refrigerate until firm, about 1 hour.
3. Remove fudge from pan by lifting foil; remove foil from fudge. Cut into squares.
Makes 36 rocky road squares.
Date: October 6, 2004