Catty corner to Dolores Park and as-of-yet untouched by the DEA, this Mission "homemade ice cream" hot-spot often sports a line out the door. There are no reports of undelicious ice creams, but it's advisable to sample a few flavors before ordering... just to be safe :)
Ice cream connoisseurs may also appreciate Humphry Slocombe.
Address: 3692 18th St, SF, CA
Website: http://biritecreamery.com/