Starbucks uses a blend of 100% percent arabica Latin American and African ground coffees for their cold brew. According to a Reddit thread, some people have tried recreating the Starbucks cold brew at home using Columbia Narino and Volcanica Sumatra beans, but they did not get the exact same taste. However, when making cold brew coffee at home, it is recommended to use medium roast coffee beans or light roast beans, as dark roasts can result in a more bitter and burnt taste. Starbucks Cold Brew is made with the Nariño 70 blend, while a different blend is used to brew double-strength coffee for its Iced Coffee.