Tastes like bitter blood orange (amaro means bitter in Italian). It’s a grape distillate that’s aged aged for 5 years in oak barrels. It gets infused with herbs, many of which I’ve never heard of: sweet and bitter orange, cinchona, gentian (huh?), quassia wood (what the??), licorice, rhubarb, saffron, tamarind, and galenga (I give up). It’s really good though.
Amaro Nonino is made in Italy’s northeastern region of Friuli. The company was founded in 1897 and is still owned and run by the Nonino family and their three daughters. I have to go visit.
I also tried it in a mojito (use the Amaro instead of rum) which was delicious too.