Method

Make the simple syrup: place the sugar and water in a small pan and heat, stirring occasionally, until sugar is dissolved and liquid is clear. Cool to room temperature, then pour into a blender and scoop in the 1/2 avocado. Puree until fully combined. The mixture will be thick but pourable.

To make the drink, fill a cocktail shaker with ice and add 2 oz avocado syrup, 1.5 oz vodka, 3/4 oz lime juice, and 2 tsp chopped mint. Shake vigorously and strain into an ice-filled glass. Top with a splash of club soda and garnish with a sprig of mint.