I found this recipe on a blog called Noshing with the Nolands.
1 1/2 cups mint
1 cup water
1 cup sugar
1 oz chocolate vodka (we used Three Olives brand)
1/2 oz mint simple syrup
ginger ale (the original used 7 Up)
mint, for garnish
To make the simple syrup, combine the water and sugar in a small saucepan over medium heat. Stir until the sugar dissolves. Let it come to a low boil and then remove the sauce pan from the heat. Add the mint, stems and all, to the syrup and allow it to steep for about 20 minutes. Strain the syrup and allow it to cool. You can stash it in the fridge if you like.
Later, when your simple syrup is cool, you can go ahead and assemble the cocktail. Just add the vodka and simple syrup to a glass with ice, top with ginger ale, and garnish with a sprig of mint.
Enjoy this sweet and refreshing drink with friends!