This drink, and a variation with hot chocolate like Bicerin, became so popular in Milan that the erstwhile waiter was able to open a string of coffee houses in the city that all featured his novel concoction.
[4] With his eyes on controlling gambling opportunities further south in Italy as the French armies advanced, taking over the concession in Naples quickly became his preoccupation.
Among the works he commissioned were operas by Gaetano Donizetti, Vincenzo Bellini, and Carl Maria von Weber.
In 1815, he offered Gioacchino Rossini a contract lasting seven seasons, and the composer obliged with ten operas, including Otello, Armida, Mosè in Egitto, Ermione, La donna del lago and Maometto II.
Among the singers in Barbaia's company for whom Rossini wrote a number of roles during this period were the tenors Giovanni David and Andrea Nozzari, the bass Michele Benedetti and the great mezzo-soprano Isabella Colbran.