“Sous vide negroni has been on the scene for a few years now,” says Sanna Tuomola, a bartender at Chapter. “Our negroni is inspired by other legends in the industry. I visited the Duck and Waffle bar in London a few months ago and tasted their Olive Americano. I loved it.”

The Olive Negroni is gently cooked, or “matured,” in sous vide at 122°F for 24 hours with a handful of olives in the mix to provide the drink an extra layer of flavor.

Source: How to Make a Sous Vide Negroni | Extra Crispy