It’s the first day of international Negroni Week (which runs thorugh June 10!) and bars around the world – more than 8,000 of them – are celebrating the classic combination of gin, Campari, and vermouth. The goal is to drink for a cause; participating bars donate proceeds of their featured Negroni cocktail specials to charitable organizations. Thus far, Negroni Week has raised nearly $1.5 million for do-good entities including Autism Speaks, Northwest Immigrant Rights Project, and SF Marin Food Bank.

Search for a local restaurant here or whip up the Negroni-inspired “Rested in Jerez” at home. At San Francisco cocktail bar The Treasury, general manager Ryan Hall puts his own spin on the classic Negroni by employing the beautiful flavors of Oloroso sherry, a fortified wine that hails from Jerez, Spain.

Hall starts by filling a 10-liter cocktail barrel with Oloroso sherry, allows it to rest for 10 months, then removes the sherry and fills the barrel with the cocktail ingredients, where they intermingle for 50 days. The result of the aging process produces a more luscious, softer version of a straightforward Negroni.

“The drink name ‘Rested in Jerez’ is a literal translation of the cocktail making process, which also reflects sherry’s place of origin” he explains. “Our riff on the classic balances the botanicals and herbal notes with the nutty flavor and body that sherry imparts.” Sales of the cocktail will be donated to The Treasury’s charity of choice, No Kid Hungry, which aims to eradicate childhood hunger in America.

Hall encourages cocktail enthusiasts to try their own handiwork with beverage aging barrels, which are becoming increasingly popular and more readily available. He recommends procuring a 2-3 liter barrel for personal use, as a smaller barrel will enable drink ingredients to have more contact with each other and faster flavor extraction from any wash (i.e. sherry).

This recipe incorporates amontillado sherry, so even if you don’t have your own aging barrel (yet), you’re still enjoying a lovely version of The Treasury’s inspired take on a Negroni.

Rested in Jerez
1 ounce Gin (The Botanist)
Half-ounce Gran Classico liqueur
Half-ounce Campari
Half-ounce Carpano Antica vermouth
Half-ounce Hidalgo “Napoleon” Amontillado Sherry

Combine ingredients in mixing glass, stir, and serve in an Old-Fashioned glass over a large ice cube. Garnish glass with an orange wheel.