A classic daiquiri couldn't be simpler: It's just rum, lime and sugar. You know the daiquiri. You love the daiquiri. Now it's time to have some fun with the daiquiri. Adding a few slices of serrano pepper into the shaker zaps this cocktail with some satisfying heat. It warms you without being warm itself, you know? You could tame it down with just one or two slices of pepper if you'd like.