The great thing about this queso is that you can serve it hot or cold. If you're serving it cold, just pour it into a bowl and enjoy right away or store it covered in the refrigerator for later. To serve it warm, just heat it on a low heat in a skillet or sauce pan on the stovetop or microwave it. Stir it frequently to ensure it doesn't burn around the edges. You want it warmed but not bubbling hot.