Warning! For those of you looking for a quick way to get drunk, just skip the chocolate and buy Everclear. It will save you a few steps.
Good now that I got that warning out of the way, we can proceed.
Step 1: Ingredients and materials
4 oz baking chocolate. Make sure it says baking chocolate, I've had bad luck with stuff like Lindt chocolate bars.
1 cup sugar, I prefer raw or turbinado, but if you wish you could use white.
1 pint whole milk. The wholer the better.
1 cup Grain alcohol 190 or 151 proof (75-90%). Its hard to find 190 proof in the states, it generally can only be found as 151. The typical American brand is Everclear. It probably shouldn't be too hard to find elsewhere.
You'll need a large pot for melting the chocolate into milk
A fine meshed strainer. I have yet to find one I like, but I found a non-disposable coffee strainer at Vons (supermarket) that worked pretty well.
Bottles (0.75-1 liter is good size), I'm not sure what to call these kinds of bottles, but I found the ones used in this instructable at Sur le Table (its close to work, don't judge me).
*Edited to add actual quantity of chocolate needed. I figured this was important.
*Edited a second time to add the quantity of alcohol needed. Turns out its also important.