2 c. miniature marshmallows
1 (12 oz.) pkg. semi-sweet chocolate chips
1 c. milk chocolate chips
1 (14 oz.) can sweetened condensed milk, not evaporated milk
Dash of salt
1/2 to 1 c. chopped nuts
1 1/2 tsp. vanilla extract

In heavy saucepan, over low heat, melt marshmallows and chips with sweetened condensed milk and salt. Remove from heat; stir in remaining ingredients. Spread evenly into wax papered (8 or 9 inch) square pan. Chill 2 hours or until firm. Turn fudge onto cutting board; peel off paper and cut into squares. Store loosely covered at room temperature.