The Penicillin is a modern cocktail that was created by Sam Ross in 2007 while he worked at Milk & Honey in New York City, New York. Although essentially a modified Whiskey Sour, it features an extraordinary mix of complementing flavors, including whiskey, citrus, honey, and ginger, that has made it a cult classic over the last decade.
Add blended Scotch, honey ginger syrup, and lemon juice to a shaker.
Fill shaker with cubed ice.
Shake for 10-20 seconds.
Add a clear ice cube to a lowball glass.
Using a julep strainer, strain into lowball glass.
Using a bar spoon, carefully float single malt Scotch on top.
Garnish with candied ginger.