The Sidra Sour is a unique cocktail that combines the traditional Basque cider, or sidra, with the flavors of a classic sour cocktail. Made with fresh lemon juice, simple syrup, and a splash of egg white for a frothy texture, this cocktail is a delightful blend of sweet, tart, and tangy. Served over ice and garnished with a lemon twist, the Sidra Sour is a must-try for cider lovers in San Sebastian.
