Snickerdoodles contain cream of tartar, an item I never used in anything else. A little digging on the Internet revealed that cream of tartar was first discovered as a by-product of wine making. Crystals of cream of tartar (aka potassium bitartrate) form on the underside of a cork in a wine bottle kept chilled in wine cellars.

Snickerdoodles – the Original and Five Variations
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