4 c. sugar
1 (13 oz.) evaporated milk
1/2 c. butter
2 sqs. unsweetened chocolate
10 oz. miniature marshmallows
1 (12 oz.) semi sweet chocolate chips
1 (12 oz.) milk chocolate chips
1 tsp. vanilla
1/2 tsp. salt

Combine sugar, evaporated milk, butter and unsweetened chocolate in a 5-quart heavy pan. Cook over medium heat, stirring constantly until mixture comes to a boil. Boil 8 minutes, stirring often. Remove from heat. Stir in marshmallows, semi-sweet chocolate, milk chocolate and vanilla. Beat until smooth. Pour into a buttered 15 1/2 x 10 1/2 x 1 inch jelly roll pan. Cool and cut in squares.