Pisco is the national spirit of both Peru and Chile and in both countries the iconic cocktail is the pisco sour, which, understandably in such hot climes...
you should recheck your source. Pisco sour is not blended with ice, its shaken and served without ice. I really like this page and the info its usually on point but I live in Peru and pisco sour its not how you put it. GET IT RIGHT!
One of the most famous Pisco cocktails is Captain. The traditional recipe is Pisco (2 oz) and red vermouth (2 oz). However, it's much better with this recipe: Peruvian Pisco Acholado (4 oz; never dare to use the Chilean liquor named as the Peruvian real thing) + red vermouth (1 oz) + 6 or 8 drops of Angostura bitter; garnish with orange peel squeezed and serve on a martini frozen glass.