Limoncello is an Italian lemon liqueur mainly produced in Southern Italy, traditionally, made from the zest of Femminello St. Teresa lemons. Lemon zest, or peels without the pith, are steeped in grain alcohol until the oil is released. The resulting yellow liquid is then mixed with syrup. Most lemons, will produce satisfactory limoncello. Limoncello is traditionally served chilled as an after-dinner digestive.