1 (14 oz.) can sweetened condensed milk
2 c. (12 oz.) semi-sweet chocolate chips
1 oz. unsweetened chocolate
1 tsp. vanilla
1 1/2 c. chopped nuts

Butter 8x8x2 inch baking pan. Stir milk and chocolate chips in 2 quart casserole; add unsweetened chocolate. Microwave uncovered on high 1 minute; stir, then microwave about 2 minutes longer until mixture can be stirred smooth. Stir in vanilla and nuts. Spread mixture evenly in pan. Refrigerate until firm.