What's full of showstopping flavour, is easy to make, and might not even necessitate a stop at the off licence to procure its limited ingredient list? Why, these cocktails that clock in at a mere three ingredients (or fewer), of course! Keep reading for the simplest inspiration to streamline your cocktail hour, whether your tastes run toward that which is light and floral (the Hummingbird), robust and indulgent (a Guinness milkshake), or something in between. Cheers!