Cream of tartar is used to give a creamier texture to sugary
things like candy and frostings and to stabilize and increase
the volume of beaten egg whites.Cream of tartar can also be
used to clean brass and copper cookware.Tartaric acid is a
brownish-red acid powder (potassium bitartrate) that is
precipitated onto the walls of casks used to age wine.
When refined into a white acid powder "cream of tartar",
it is used for baking. Cream of tartar is an acid powder.
Combined with baking SODA it makes baking POWDER.