Limoncello is an Italian lemon liqueur with the nice fresh taste of lemons. It is easy to make yourself, and in many trattorie in Italy it is customary to get a glass of ice cold homemade limoncello on the house when you get the check. As with many Italian recipes, the quality of the ingredients (in this case the lemons) is important, and the ingredients are not always simple to find (in this case 95% proof alcohol). 95% proof alcohol is difficult to find and expensive in the Netherlands, but in Italy it is sold by every supermarket. So I brought some home from my latest trip.
Since you will be infusing the liqueur with the zest of the lemons, they need to be ‘untreated’. Most lemons (and oranges) are treated with wax. Since you’d like to make a lemon liqueur rather than a wax liqueur, you need untreated lemons. The best lemons are those from the Sorrento peninsula, but you may be hard pressed to find those.