1/2 c. butter
14 1/2 oz. can evaporated milk
2 oz. unsweetened chocolate
12 oz. Sweet Baker's chocolate
2 c. chopped nuts, optional
4 1/2 c. sugar
1 tbsp. vanilla
8 oz. marshmallows
12 oz. semi-sweet chocolate bits

Combine butter, milk and sugar in a pan; stir over medium heat until sugar dissolves. Cook until mixture boils, stir frequently. Cover and boil 5 minutes. Remove from heat; add marshmallows and stir until melted. Add all three chocolates (one at a time), stirring until melted. Add vanilla and nuts. Mix well. Pour into a buttered jelly roll pan. Chill until firm.