Microwave Fudge

14 oz semi sweet chocolate chips
1 cube butter
1 can sweetened condensed milk
1 C chopped nuts optional

Put the first three ingredients into glass bowl and microwave for 3 minutes. Mix well, add nuts and our into greased or waxed lined 8x8 pan. Peanut butter chips may be substituted for the chocolate chips. Or you can make two batches and pour the peanut butter batch over the chocolate batch when it is cool