BLENDING HOT LIQUIDS: When blending hot liquids, remove liquid from the heat and allow to cool for at least 5 minutes. Transfer liquid to a blender or food processor and fill it no more than halfway. If using a blender, release one corner of the lid; that prevents the vacuum effect that creates heat explosions. Place a towel over the top of the machine, pulse a few times, then process on high speed until smooth. The blended corn tortillas act as thickeners. This soup should not be as thick as a cream soup, but should have some body.