IL PROFESSORE
30ML GIN
30ML CAMPARI
30ML SWEET VERMOUTH
10ML COFFEE LIQUEUR (preferably a small-batch Italian version; otherwise, Kahlúa is fine)
SLICE OF ORANGE FOR GARNISH COFFEE BEANS FOR GARNISH (optional)
COMBINE THE GIN, CAMPARI, VERMOUTH AND COFFEE LIQUEUR IN AN OLD-FASHIONED GLASS FILLED WITH ICE. STIR AND GARNISH WITH THE ORANGE SLICE AND COFFEE BEANS, IF USING