Have you ever wanted to make chocolate truffles as rich and decadent as those you find in a chocolate shop? You can. Keith Cedotal, the pastry chef at Sustenio, will be teaching people how to make perfect chocolate truffles and chocolate mousse during two cooking classes this Saturday at GauchoGourmet, 935 Isom Road. One is set for 10 a.m., the other at noon. The cost is $10 a person and includes the class as well as tastes of Cedotal's creations. Seating is limited. For reservations, call (210) 277-7930. The warehouse will be open during the demonstrations for those who want to shop. After the classes and until Valentine's Day, GauchoGourmet will be selling its chocolate for 20 percent off.