My current favorite drink. I found a place here in Helena that makes amazeballs mules.
Most recipes call for vodka (Moscow Mule) but I prefer bourbon (Kentucky).
Ingredients:
1/2 oz. lime juice
2 oz. vodka (::cough cough bourbon cough cough::)
4-6 oz. ginger beer (Cock N' Bull is preferred though Barritt's is pretty good as well. If you can find alcoholic ginger beer all the better. Ginger ale is OK, but only as a last resort.)
Squeeze a lime into a copper mug (gotta be pure copper, none of that stainless lined crap) and drop in the rind.
Add ice. As much or as little as you'd like.
Pour in the vodka/bourbon.
Fill the rest of the mug with cold ginger beer.
Serve with a stirring rod or a straw.
Enjoy! (Responsibly.... or not)