So, how do you make this wonderful stuff? The ingredients are as follows:
1 750 mL bottle of grain alcohol ( Everclear
or similar, also known as rectified spirit
--as long as it's potable, strong, and unflavored you'll be fine)
Zest of 8 lemons
Simple, yes? Oh, you'll also need a glass jar in which to keep the stuff. Be sure you have lots of spare room, as you'll add more liquid later. Mine is two liters, and works great.
You want to get the strongest alcohol you can get your hands on. Vodka, even the 100 proof stuff, isn't sufficient. In some states, such as Nevada, you can get 190-proof Everclear, which is 95% ethyl alcohol. Alas, California isn't one of them, so I'll make do with 151 proof (75.5% alcohol, which is still pretty stiff). You can as well, but go with the high-test if you get it. You'll dilute it down to something drinkable later; right now we need a strong but potable nonpolar solvent, and high-proof alcohol fits the bill. I understand an old catalog came with a disclaimer that Everclear was to be used "for the production of homemade cordials," or some such, which is exactly what you're doing here.