No. 15: Alton's Guacamole : Master the ultimate guacamole with Alton's five-star recipe, our 15th most-saved recipe. Alton’s secret tool for perfect guacamole is a potato masher. You get a chunky mash, instead of a puree or chopped-up chunks. Cover the guacamole and let it sit at room temperature for an hour before serving, allowing all of the flavors to meld together.