1 c. (2 sticks) butter
1 (12 oz.) can evaporated milk
5 c. sugar
3 (6 oz.) pkg. chocolate chips
1 tbsp. vanilla
2 c. chopped nuts
1 pkg. miniature marshmallows, melted over double boiler

Mix butter, milk and sugar in heavy saucepan. Let reach bubbly boil. Turn burner down to medium. Cook 8 or 9 minutes. Remove from heat. Add chocolate chips and stir until melted. Add vanilla, nuts and marshmallows. Pour in an 18x12-inch pan. Let stand for a while (overnight if possible) before cutting. Freezes well. Put waxed paper between layers.