Your favorite brand of cold brew coffee will work for this recipe as long as it is unflavored and unsweetened. I love to keep the cold brewed coffee in my refrigerator at all times for iced coffees. If you do not want to buy the cold brew from the refrigerated section of your grocery store, then you can just brew a large pot of coffee and reserve 1 cup. You will need to allow it to cool completely before using. Make sure your brewed coffee is unflavored as well. I like a medium or bold variety for this recipe.