Microwave Fudge
["3 c. semi-sweet or chocolate chips", "1 (14 oz.) can sweetened condensed milk", "1/4 c. butter or margarine", "1 c. chopped nuts"]
["Place all ingredients, except walnuts, in a large bowl. Microwave at Medium (50% power) until chocolate chips are melted (about 3 to 5 minutes), stirring once or twice during cooking. Stir in nuts.", "Pour into well-greased (8 x 8-inch) square baking dish.", "Refrigerate until set (overnight if possible)."]
["semi-sweet", "condensed milk", "butter", "nuts"]