McCormick All Natural Kosher Cream Of Tartar, 1.5 oz Bottle. McCormick Cream of Tartar is an ingredient essential to all bakers and especially for holiday baking. It adds texture, volume and lift to beaten egg whites in angel food cake, meringue shells, meringue for pies and 7-minute frostings, resulting in light and fluffy desserts. Cream of tartar, also known as tartaric acid, is a byproduct of the fermentation of grapes into wine. This tasteless baking necessity stabilizes beaten egg whites in...