Combine all of the ingredients in a medium mixing bowl. Put 4 layers of cheesecloth in a fine mesh sieve set over a large bowl or plastic container. Add the yogurt and cover with the cheesecloth overhang. Put a small plate directly on the cheesecloth and top with a 16-ounce can. Refrigerate for 1 hour. The desired consistency is that of Greek yogurt or thick sour cream. Store in the refrigerator, in an airtight container, for up to 10 days.
Recipe courtesy of Alton Brown, 2010