Sam Ross, Milk and Honey, New York City, 2005. Ross created the drink inspired by the sour template and the medicinal qualities of ginger, honey, and Scotch whisky as traditional remedies. Named for Alexander Fleming's 1928 discovery of penicillin (the antibiotic, not the cocktail). The drink spread from Milk and Honey to bars globally through the cocktail renaissance and is now considered a modern classic.
The Penicillin is the most important cocktail created in the 21st century — blended Scotch whisky, fresh lemon juice, honey-ginger syrup, and a float of Islay single malt Scotch whisky, served over ice in a rocks glass. Created by Sam Ross at Milk and Honey in New York City in 2005, it is the rare modern cocktail that has entered the permanent canon alongside 20th-century classics. The drink's genius is the float: a medicinal measure of peaty Islay Scotch (Laphroaig Quarter Cask or Ardbeg 10) rests on the surface of the ginger-honey-lemon base, so that every sip passes first through the smoke and peat before encountering the warmth and sweetness beneath. It is a cocktail that tells a story in layers.
FOOD PAIRING: The Penicillin's smoke, ginger heat, and honey sweetness pairs with smoked, cured, and spiced preparations. Provenance 1000 pairings: smoked salmon with dill crème fraîche (smoke-on-smoke), grilled lamb with honey-rosemary glaze (the honey bridge), oysters with a smoked finish (the peat amplifies the ocean's iodine), hot honey fried chicken (ginger-honey-heat trinity), and Scottish smoked haddock chowder.
{"Blended Scotch is the base: Johnnie Walker Black, Compass Box Great King Street, or Famous Grouse provide the backbone. The blend's accessible maltiness and grain sweetness provide the foundation that the Islay float contrasts with.","House-made honey-ginger syrup: combine 1 part fresh ginger juice (pressed or grated and squeezed) with 2 parts honey (a good floral or acacia honey). The ginger's heat and the honey's sweetness together create a natural medicine cabinet flavour that the drink's name references.","Fresh lemon juice: 3/4 oz. Standard ratio: 2 oz blended Scotch, 3/4 oz fresh lemon juice, 3/4 oz honey-ginger syrup. Shake hard with ice.","The Islay float: pour 1/4 oz Laphroaig Quarter Cask or Ardbeg 10 over the back of a bar spoon so it sits on the surface of the drink. The peat smoke and iodine of the Islay Scotch arrive with every nosing and first sip before integrating into the drink as consumed.","Double-strain over one large ice cube in a rocks glass. The large ice cube maintains temperature without excessive dilution during the drinking experience.","Garnish with a candied ginger on a pick — the ginger garnish provides a chewable flavour bridge between the ginger syrup, the honey, and the Scotch."}
The honey-ginger syrup ratio adjustment: for maximum ginger heat (appropriate for cold and flu season), increase fresh ginger juice to a 1:1 ratio with honey. For a sweeter, more approachable version, 1:3 ginger:honey is the 'gateway' Penicillin for drinkers new to peat. The fresh ginger should be Korean or Peruvian young ginger (less fibrous, more intense) rather than old grocery store ginger. The Mezcal Penicillin (substitute mezcal for Scotch with a Laphroaig float) is an extraordinary variation that doubles the smoke.
{"Using single malt throughout instead of a blend as the base: single malt is too complex and expensive to play the supporting role. The blend's straightforwardness is what makes the Islay float legible.","Using cheap honey syrup without fresh ginger: powdered ginger lacks the volatile heat compounds; commercial honey syrups lack floral complexity. The Penicillin demands house-made honey-ginger syrup.","Not floating the Islay Scotch: a Penicillin without the float is a honey-ginger Scotch Sour — a fine drink, but not the Penicillin. The float technique is the drink's defining element.","Using a heavily peated Islay Scotch (Octomore) for the float: the float needs to be noticeable but not overwhelming. Laphroaig Quarter Cask or Ardbeg 10 provide 40–46 ppm phenols — medicinal smoke without annihilation."}