These are mostly a traditional shortbread cookie but with a matcha green tea upgrade. I love the color of the matcha powder, but it also imparts a flavor that I like, too.
Preheat the oven to 350°F. Line a baking sheet with parchment paper.
In the bowl of a stand mixer, whisk the confectioner's sugar and matcha powder. Add the butter and, using the paddle attachment, mix until the mixture is smooth and light in color. Add the flour and continue mixing until combined. Add the egg yolks and mix until they are incorporated and a dough forms. Transfer the dough to a clean surface and form it into a disc. Wrap it in plastic wrap and chill it in the refrigerator for 30 minutes or until the dough is firm.
Roll the dough to 1/2" thickness. Cut out cookies with a cookie cutter. Coat each cookie with the granulated sugar and place them on the baking sheet. Bake the cookies for 12 to 15 minutes, or until they are lightly golden around the edges.
The nutrition information provided are only estimates based on an online nutritional calculator. This is not a comprehensive list of all the nutrients in the recipe (i.e., does not include vitamins, cholesterol, etc). I am not a certified nutritionist. Please consult a nutritionist or doctor for accurate information and any dietary restrictions and concerns you may have.