Sherry is gluten free. It’s made entirely from grapes, fermented into wine, and then fortified with grape-based spirit. No gluten-containing grains are involved at any stage of production, making it a safe choice for most people avoiding gluten.
What Sherry Is Made From
Sherry starts with grapes, and that’s essentially where the story ends for gluten concerns. All dry styles of sherry are traditionally produced from the Palomino grape, grown in the Jerez region of southern Spain. Naturally sweet sherries use two other grape varieties: Pedro Ximénez and Moscatel. After pressing, the grape juice ferments until nearly all the sugar converts to alcohol, producing a dry base wine.
The step that makes sherry different from regular wine is fortification. Winemakers add a neutral grape spirit to raise the alcohol content, typically to around 15% or higher depending on the style. This spirit is distilled from wine, not grain. In the Jerez region, it’s traditionally produced from Airén grapes grown in La Mancha. Since both the base wine and the fortifying spirit come from grapes, there’s no point in the process where wheat, barley, rye, or any other gluten source enters the picture.
The Barrel Question
One concern that occasionally surfaces is the use of wheat flour paste to seal oak barrels. This is a real practice in winemaking: some barrel makers apply a mixture of unbleached flour and water to the outside of the barrel heads to ensure a leak-proof seal. Sherry ages in oak barrels for years, sometimes decades, so it’s reasonable to wonder whether this could introduce gluten into the wine.
In practice, the risk is extremely low. The paste is applied to the outside of the joint where the barrel head meets the staves, in an area that doesn’t directly contact the wine. Barrels are also washed thoroughly inside and out before use. Most modern barrel makers have moved away from flour paste entirely, sealing barrels with edible wax instead. The flour paste method persists mainly in smaller operations that make their own barrels.
The Celiac Disease Foundation notes that wines fermented in barrels lined with wheat paste, including fortified wines like port and Madeira, are unlikely to contain enough gluten to cause a reaction. Wine generally tests well below the FDA threshold of 20 parts per million of gluten.
Styles That Need a Closer Look
Not all bottles labeled “sherry” are identical. Traditional sherry from Jerez, whether it’s a bone-dry Fino, a nutty Amontillado, or a rich Oloroso, is straightforward: grapes in, wine out. But some commercial products marketed as “sherry” or “cream sherry” may include added colorings, flavorings, or sweeteners that could complicate things.
The Celiac Disease Foundation specifically flags dessert wines with added color or flavoring as products worth checking more carefully. If you’re picking up an inexpensive cooking sherry or a flavored product from the grocery store, read the label. True Spanish sherry from the Jerez-Xérès-Sherry denomination of origin is tightly regulated and won’t contain grain-based additives, but mass-market products that borrow the name may play by different rules.
Fining Agents and Processing
During production, winemakers sometimes use fining agents to clarify wine by removing suspended particles. Common fining agents in wine include egg whites, casein (a milk protein), and bentonite clay. Wheat-based fining agents exist but are rare in wine production. Even when used, fining agents are removed from the final product rather than remaining in it.
Sherry production doesn’t typically involve gluten-containing fining agents. The traditional solera aging system, where sherry matures and blends over time in a series of barrels, naturally clarifies the wine over its long aging period.
Cooking Sherry vs. Drinking Sherry
If your search is motivated by a recipe that calls for sherry, you’ll encounter two options at the store: cooking sherry and real sherry. Cooking sherry is a shelf-stable product with added salt and sometimes preservatives. While the base is still grape wine, these added ingredients are worth checking if you’re strictly gluten free. The ingredient list on cooking sherry should tell you what you need to know.
Real sherry from a wine shop is the simpler choice from a gluten perspective. It’s also a better choice from a flavor perspective, since cooking sherry’s added salt can throw off a recipe. A dry Fino or Manzanilla works well in savory dishes, while a Pedro Ximénez adds sweetness to desserts and glazes.