2 teaspoons matcha (food grade is fine)
3/4 cup sparkling water
1/2 cup lightly packed fresh spearmint leaves, plus a few sprigs for garnish
2 tablespoons organic blonde cane sugar
1-2 tablespoons fresh lemon juice
1/2 cup ginger beer
Place the matcha in a bowl, and gradually work in a tablespoon of the sparkling water drop by drop, stirring constantly, until the matcha is a smooth paste. Gradually stir in the rest of the water.
Place the mint leaves and sugar in a jar or measuring pitcher, and mash with a muddler (or the back of a wooden spoon) until the sugar is dissolved and the leaves are bruised. Stir in 1 tablespoon of the lemon juice, and all of the bourbon and the matcha mixture. Strain the mixture through a fine mesh sieve, pressing on the mint to extract all the good stuff. Taste, adding more lemon if you feel the drink needs it, then pour into two ice-filled tumblers and garnish with a few mint leaves.