Step 1

In the bowl of a stand mixer fitted with a paddle attachment, cream together softened butter, sugar, and matcha until smooth, about 3 minutes. Add egg and mix until incorporated. Scrape down bowl as needed to ensure thorough mixing.

Step 2

In a medium bowl, whisk together flour, baking soda, cream of tartar, and salt. Add dry mixture to mixing bowl. Mix on low speed until dough forms. Scrape down bowl as needed. Do not overmix.

Step 3

Cover and refrigerate dough for at least 1 hour, overnight is best.

Step 4

Preheat oven to 350°F. Line baking sheets with parchment paper or silicone baking mat. Set aside.

Step 5

Use a 1 ½ Tablespoon scoop (#40 scoop) to portion out dough. Roll into ball and coat with granulated sugar.  Place cookie balls 2-inches apart of prepared baking sheet. Bake 13-15 minutes, until the edges of the cookies are set. Allow to rest in baking sheet for 3-5 minutes before transferring to wire rack to cool.