(NBC) -- While controversial, medical marijuana is now legal in 16 states. There are already a variety of ways medical marijuana patients can ingest that pot. Some smoke it. Some choose to eat it in things like cookies or even ice cream. There's one chef in California who is taking it to the next level, by adding it to wine. With an ideal climate and soil, California is one of the world's premier wine regions. The state accounts for nearly 90 percent of total American wine production. But a local chef says there's a secret in wine country. One that has been hidden for years.