Which style of Sherry typically has the highest alcohol content?

Oloroso Sherry is known for its higher alcohol content compared to other styles. This wine undergoes a fermentation process without the protective Flor yeast, which means it typically doesn't receive the same level of biological aging. Instead, Oloroso is fortified with wine spirit, increasing its alcohol content significantly, generally ranging from 18% to 20% ABV. This fortification process contributes to the fuller body and richer flavor profile of Oloroso, giving it a distinct character that differentiates it from other types of Sherry.

Amontillado, although robust, does not reach the same alcohol levels as Oloroso as it is usually fortified after some biological aging. Fine Sherry, which includes Fino and Manzanilla styles, is lower in alcohol due to the presence of Flor during aging, resulting in about 15-17% ABV. Palo Cortado is a unique style that can sometimes reach similar alcohol levels as Oloroso, but overall, Oloroso remains the most consistently high in alcohol content due to its production method and fortification practices.