A modern classic created by Sam Ross in 2005, the Penicillin has earned its place among the cocktail canon for good reason. The drink balances smoky blended Scotch against bright lemon and warming spiced honey-ginger, creating a cocktail that feels both medicinal and indulgent. A float of peaty Islay whisky on top adds a campfire-smoke nose that meets you before each sip, giving way to the sweet heat beneath.