3 c. semisweet or milk chocolate chips
14 oz. sweetened condensed milk
1/4 c. butter
1 c. chopped walnuts

Place all ingredients except nuts in large bowl. Microwave until chocolate chips are melted, 3-5 minutes, stirring once or twice during cooking. Stir in nuts. Pour into well greased 8 x 8 inch pan. Refrigerate until set. Variation: 1 cup peanut butter chips for 1 cup chocolate chips or 3 cups peanut butter chips. Makes 2 pounds.