What the heck is Cream of Tartar?
Cream of Tartar is a kitchen staple used to stabilize whipped cream or egg whites when making cakes, cookies, pies, pancakes and meringues. But! Cream of Tartar can also be used as a metal polish by mixing it with lemon juice or distilled vinegar to form a paste. What does wine have to do with Cream of Tartar? It starts out as potassium bitartrate that crystallizes during grape fermentation inside wine barrels used to age wines. It is then purified and ground into powder.
Storing Tip: Store in a sealed container away from moisture, heat and light.