this is an old italian familly recipe. limoncello is a liquer popular in southern itally and is usually served ice cold after a large meal....
when i was in california we picked close to 40lbs of lemons to make this, and a case of vodka (there it only costs 60$ for a case)
here is the recipe
1 half gallon vodka or 2 fifths
18-22 lemons per half gallon
4 cups sugar
5 cups water.
zest the lemons, but dont get any of the white peal part, put in a large mason jar or glass container. dump in the vodka and let sit for up to 60 days.
then boil the sugar and water together for about 10 minutes, let cool completley, and then add to the vodka/lemon peals.
let that sit up to another 40 days, then bottle, but keep bottles in the freezer however if you wanted, its safe to bottle as soon as 5 days
but like making beer, keep this stuff out of the light
really good stuff.... about 35-40$ a bottle at the store
im typing this as im finnishing up making a 5 gallon batch