Preheat Oven: Preheat oven to 350°F (175°C) and line a baking sheet with parchment paper.
Mix Dry Ingredients: In a bowl, whisk together flour, matcha powder, baking soda, and salt. Set aside.
Prepare Wet Ingredients: In another bowl, beat softened butter and sugar until creamy. Add egg, vanilla, and espresso; beat until combined.
Combine: Slowly add dry ingredients to the wet mixture, mixing until just combined. Stir in white chocolate chips.
Shape Cookies: Drop tablespoon-sized scoops of dough onto the prepared baking sheet.
Bake: Bake for 12-15 minutes or until edges are golden.
Cool: Allow to cool on the baking sheet for 5 minutes before transferring to a cooling rack.
Serve: Enjoy with your favorite matcha latte (or more coffee, because why not).