This drink is called a "burro" because it's a play on the mule—which in the cocktail world refers to any drink that has a kick of ginger. For many mules, this means ginger beer, but Ivy Mix's version relies on spicy ginger syrup for its zip. Rounded out with pineapple and lime, it's a delightfully refreshing cocktail.
Into a small pot set over low heat, add ginger juice and sugar. Stir frequently until sugar is dissolved; then turn off the heat and allow syrup to cool. (Note: Ginger Syrup will keep in an airtight container in the fridge for up to 2 weeks. Ivy Mix recommends adding a shot of vodka to extend shelf life to 1 month.)
Assemble: Into a cocktail shaker, add cooled Ginger Syrup, pineapple juice, lime juice, rum, and bitters; top the shaker with ice. Fill a rocks glass with ice, then add about an inch of club soda. Cover and shake the cocktail vigorously for about 10 seconds; strain into the glass. Garnish with a slice of candied ginger and a lime wheel, speared with a cocktail stick.