1/2 c. butter
3 2/3 c. white sugar
1 1/8 c. brown sugar
13 oz. Hershey milk chocolate bar "A"
2 oz. sq. unsweetened chocolate "B"
12 oz. semi-sweet chocolate chips "C"
1 tbsp. vanilla
1 (13 oz.) can evaporated milk
32 lg. marshmallows
1/2 to 2 c. chopped nuts

Combine butter, sugars and milk in large pan. Stir a few times until it boils. Cover and let boil 5 minutes without stirring (over low heat). Remove from heat; add marshmallows and stir until dissolved. Add chocolate A, B, C, one at a time; dissolve each (may have to keep pan warm in warm water). Add vanilla and nuts. Pour into lightly greased 10 x 15 inch jelly roll size pan. Chill before cutting.