The Negroni Sbagliato is a modern cocktail that was created in 1972 by Mirko Stocchetto at Bar Basso in Milan, Italy. It's a simple variation of the classic Negroni that is said to have been first made when Stocchetto accidentally grabbed a bottle of sparkling wine instead of gin and poured it over top of the Campari and sweet vermouth.
Fill a highball glass with cracked ice.
Add Campari and sweet vermouth to glass.
Using a bar spoon, stir for 5-7 seconds.
Top with Prosecco.
Garnish with orange twist.