Preheat oven to 325ºF and line a medium baking sheet with parchment paper. In a medium mixing bowl, stir together flour, Sun Goddess Matcha, baking powder, and sea salt. Set aside.
In a separate medium mixing bowl, use a hand mixer on medium speed to beat sugar and butter together until combined, about 20 seconds. Add egg and vanilla extract. Continue to beat until just combined.
Gradually mix dry ingredients into wet using hand mixer. Fold in chocolate chunks.
Roll dough in 12 balls and place on cookie sheet 2-inches apart. Bake for 14-16 minutes. Cool cookies on baking sheet for 10 minutes before transferring to a wire cooling rack to cool completely.