In a large mixing bowl, cream butter and both types of sugar. Mix in sifted matcha tea powder. Add egg and vanilla and mix to combine.
Bake cookies for 8-10 minutes, or until they are no longer shiny on top. Allow cookies to cool for 5 minutes on the baking tray then transfer them to a wire rack to cool completely.
Matcha Cookies https://livingoncookies.com/matcha-cookies/