3 c. chocolate chips
1 can sweetened condensed milk
1/4 c. butter, cut into pieces
1 c. walnuts, chopped

Combine first 3 ingredients in a 2 quart glass bowl. Microwave at medium 4 to 5 minutes. Stir every 1 1/2 minutes. Stir in nuts. Pour into buttered 8 inch dish. Chill 2 hours. Cut. Yield 2 pounds.