2 100 Proof Vodka
Wash the lemons well with a vegetable brush and hot water to remove any residue of pesticides or wax.
Pat the lemons dry.
Using a vegetable peeler, peel the lemons.
If you do get some of the pith with the zest, carefully scrape it away with the tip of a knife.
Fill the jar with one bottle of the vodka and the zest.
Cover the jar and let it sit forty days at room temperature in a dark cabinet.
Combine the sugar and water in a saucepan, bring it to a boil and cook until thickened, about five minutes.,
Let the syrup cool before adding it to the limoncello mixture, along with the other bottle of vodka.
Cover and return to the cupboard for another 40 days.
Strain the limoncello into bottles and discard the lemon zest.
Store them in a cupboard or the freezer.