The Old Pal is a classic cocktail that was created by bartender Harry MacElhone in the early 1900s at his bar Harry’s New York Bar in Paris, France. It's one of two popular variations of the Negroni that call for equal-parts spirit, vermouth, Campari, and citrus. This version swaps out the gin for an aged whiskey and sweet vermouth for dry, and it's believed to have been named for William Harrison “Sparrow” Robertson, a writer at the Herald Tribune who used to call everyone he met “old pal."
Add rye, vermouth, and Campari to a mixing glass.
Fill mixing glass with cubed ice.
Using a bar spoon, stir for 30-45 seconds until well-chilled and slightly diluted.
Add a clear ice cube to a lowball glass.
Using a julep strainer, strain into lowball glass.
Garnish with orange twist.