For Watermelon Simple Syrup
- To make the watermelon simple syrup, combine sugar and watermelon juice in small saucepan over medium heat and stir until sugar is dissolved. Let cool, and measure out two ounces. Keep remaining watermelon simple syrup in the refrigerator for up to two weeks.
- Combine the vodka, simple syrup and lime juice in a cocktail shaker with ice. Shake vigorously for 30 seconds.
- Pour vodka mixture into two ice filled mule mugs. Top each glass with 1 oz of ginger beer. Garnish with watermelon wedges and mint sprigs and enjoy!