1 1/2 c. chocolate chips
1/2 c. crunchy peanut butter
2 tbsp. butter
36 or more lg. marshmallows
1/2 c. chopped nuts

In heavy saucepan on top of double boiler, combine first 3 ingredients. Heat, stirring occasionally until melted. Put marshmallows in 8 inch square pan and pour the chocolate mixture over them. Sprinkle on (and press down) the nuts, on top. Chill until firm. Cut into squares.