Processed

Wine Lees Derived

A tier

Wine-lees cream of tartar is the honest origin story made explicit: potassium bitartrate crystallised in barrels and tanks, then harvested, washed, and refined. All real cream of tartar starts as a wine deposit; this variety is sold when the producer wants that agricultural link on the label rather than a nameless refined acid. Chemically it should match the fine powder once purified. A faintly winey or grey rustic cream is under-refined and can off-colour a white meringue. Buy lees-derived for the story and the farm-winery loop; still demand a food-pure, white grind for pastry.