Sour Cream C30 - 5 Packets Ricki's Sour Cream Starter will turn a quart of cream into delicious, thick, "old world" style sour cream. For a low fat substitute you can use this culture with low fat or skimmed milk. Each packet sets 1 quart of cream. Includes 5 packets. We do not offer this via Fullfilled by Amazon to ensure the culture is fresh and kept frozen until shipped.