Overview
A Moscow mule is a cocktail made with vodka, ginger beer and lime juice, garnished with a slice or wedge of lime, and a sprig of mint. The drink, being a type of buck, is sometimes called vodka buck.
The Moscow mule is popularly served in a copper mug, which takes on the cold temperature of the liquid. Some public health advisories recommend copper mugs with a protective coating (such as stainless steel) on the inside and the lip, to reduce the risk of copper toxicity.
Variations
Due to the popularity of the Moscow mule, other buck cocktails with different liquors have been labeled with the "mule" name in recent years. Variations with the name changed accordingly:
Aussie mule: Bundaberg Rum.
Berner mule: Ingwerer.
Bohemian mule: Absinthe.
Canary mule: Honey rum
Dead man's mule: Absinthe and cinnamon schnapps.
French mule: Cognac and angostura bitters.
Gin-gin mule, London mule, Munich mule, Foghorn: Gin.
Glasgow mule: Blended Scotch whisky and St-Germain liqueur.
Irish mule: Irish whiskey.
Jallu-muuli: Jaloviina.
Jamaican mule: Spiced rum.
Kentucky mule, Horsefeather: Bourbon.
Manila mule: Lambanog and calamansi instead of lime.
Merican Mule: Canned Moscow Mule brand.
Mexican mule: Tequila.
Mezcal mule: Mezcal.
Mistletoe mule: Garnished with rosemary and cranberries.
New Orleans mule: Bourbon and coffee liqueur.
Oslo mule: Akvavit.
Portuguese mule: Pinguça.
Prickly pear mule: Pear liqueur and Poire Williams.
Southern mule: Southern Comfort liqueur.
Tennessee mule: Tennessee whiskey.
Tuscan mule: Tuaca liqueur.
Berlin mule: Jägermeister
Mississippi mule: Cathead Honeysuckle vodka.
Westphalian mule: Korn, Apple juice instead of lime and cucumber
From Wikipedia (CC BY-SA 4.0).