Cream of tartar is naturally gluten-free — a chemical compound derived from grape skins, not a grain.
Yes. Cream of tartar is potassium bitartrate — a byproduct of winemaking that forms inside wine barrels when tartaric acid from grapes crystallizes. It’s a chemical compound, not a grain, and no wheat, barley, rye, or oats touch its production. McCormick, Spice Islands, Frontier Co-op, and Bob’s Red Mill all sell gluten-free cream of tartar. Bob’s Red Mill and Frontier are GFCO-certified.
Cream of tartar is one of the cleanest gluten-free baking ingredients on the spice rack. Despite the name sounding like it could be dairy or savory, it’s a chemical compound from grape skins — potassium bitartrate that crystallizes inside wine barrels during fermentation. No grain involvement at any stage. All major US spice brands sell gluten-free cream of tartar.
What Cream of Tartar Is
Cream of tartar is the common name for potassium bitartrate (also called potassium hydrogen tartrate). It’s a byproduct of winemaking: tartaric acid naturally occurs in grapes, and during fermentation, the acid combines with potassium to form crystals that adhere to the inside of wine barrels. These crystals are collected, purified, ground, and sold as the white baking powder we know.
Per FDA labeling rules, gluten-containing grains are wheat, rye, barley, and their crossbred hybrids. None of these is involved in cream of tartar’s production. It’s inherently gluten-free by chemistry and origin.
Common Uses in Baking
- Stabilizing whipped egg whites — meringues, soufflés, angel food cake
- Activating baking soda — in homemade baking-powder recipes
- Preventing sugar crystallization — in syrups, frostings, candy-making
- Giving snickerdoodles their tangy flavor — the characteristic cinnamon-sugar cookie
- Cleaning copper cookware — non-baking household use
Major Cream of Tartar Brands
- McCormick — most widely available, gluten-free
- Spice Islands — gluten-free
- Frontier Co-op — gluten-free, often GFCO-certified
- Bob’s Red Mill — GFCO-certified gluten-free at <10 ppm
- Anthony’s Goods — gluten-free
- Generic / store-brand cream of tartar — generally gluten-free; verify each
Cross-Contamination Risk
Manufacturing
Low
- Single-ingredient chemical compound.
- Major brands maintain GF controls.
- Bob’s Red Mill and Frontier Co-op offer GFCO-certified options.
Restaurant / Bakery
N/A
- Cream of tartar is a baking ingredient, not standalone food.
Home Pantry
Low
- Sealed container, standard pantry storage.
- Has a very long shelf life (years).
Frequently Asked Questions
Is cream of tartar gluten-free?
Yes. Cream of tartar is potassium bitartrate — a chemical compound formed as a byproduct of winemaking from tartaric acid in grapes. It contains no wheat, barley, rye, or oats. Naturally gluten-free across all major brands. McCormick, Spice Islands, Frontier Co-op, and Bob’s Red Mill all sell gluten-free cream of tartar. Bob’s Red Mill and Frontier are GFCO-certified.
Is McCormick Cream of Tartar gluten-free?
Yes. McCormick Cream of Tartar is naturally gluten-free. McCormick maintains gluten-free controls on their spice line, though McCormick doesn’t formally label cream of tartar with a “Gluten Free” claim — the compound is inherently gluten-free by chemistry.
Is cream of tartar a dairy product?
No. Despite the “cream” in the name, cream of tartar is not a dairy product. It’s potassium bitartrate, a chemical compound from grape skins. The name is historical — the substance was originally called “cream” because of its fine white powder texture. It contains no milk or dairy.
Can celiacs use cream of tartar in baking?
Yes. Cream of tartar is one of the safest baking ingredients for celiac patients. Common uses include stabilizing whipped egg whites in meringues and soufflés, activating baking soda, preventing sugar crystallization, and adding the tangy flavor to snickerdoodles. All major spice brands are gluten-free.
What’s a GFCO-certified cream of tartar?
Bob’s Red Mill and Frontier Co-op cream of tartar are GFCO-certified gluten-free at the strict <10 ppm threshold. For severely sensitive celiacs needing the strictest assurance, these are the gold-standard brands. The certification verifies dedicated GF production and per-batch testing.
Is tartaric acid gluten-free?
Yes. Tartaric acid (the parent compound of cream of tartar) is also gluten-free. It naturally occurs in grapes and is sometimes used directly as a baking acid or in candy-making. Both tartaric acid and its potassium salt (cream of tartar) are gluten-free.