Pour the chocolate chips into a microwave-safe bowl. Pour the sweetened condensed milk over the top of the chocolate chips. Microwave for 2 minutes on high. Then stir briskly to melt the chocolate chips into the sweetened condensed milk. If there are still lumps, microwave for 1 more minute, and stir briskly again.Serve the hot fudge warm over ice cream, pound cake, fresh berries, fingers ...Note: This method can also be done on the stovetop.