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How is cream of tartar made? I... | Almanac.com

How is cream of tartar made? I...

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How is cream of tartar made? I heard it was from the bottom of wine barrels.
Answer
You’re close. Cream of tartar is potassium hydrogen tartrate, the acidic potassium salt of tartaric acid. An impure form, called tartar or argol, forms naturally during the fermentation of grape juice into wine and crystallizes in the wine casks.