The burro is a wickedly-delicious tequila mule, invented by jim meehan of pdt (although strangely, it doesnt appear in his book). Tequila and pineapple juice are tasty partners for lime and ginger, but the real star of the show is the absinthe. Mules often have a tendency to be dominated by their ginger beer component, but the burros smaller measure of ginger beer, paired with a little splash of absinthe, makes a little more space for the drinks other flavors to come out and play. Its not part of the original spec, but we like to make this one with pineapple syrup in place of the simple, for a bit more of that tropical kick.