Green Tea & White Chocolate Cookie

1.Sift the flour and the matcha (Green Tea) powder. 2.Cream together the butter, sugar, and salt until soft and light. 3.Add the egg yolks and beat well. 4.Gradually add the flour/matcha (Green Tea) powder mixture. 5.Fold in the white chocolate chips. 6.Shape the dough into 2 round logs and wrap them in plastic wrap. Place your wrapped log on a bed of rice to chill . (Update: I got this great advice from That Skinny Chick Can Bake). Your log will stay cylindrical and your cookie slices won’t have a flat side. Chill in refrigerator for several hours or, better yet, overnight. 7.Preheat oven to 300F (150C) degrees. Remove the dough from plastic wrap and cut the cookie slices to 7mm (1/4 inch) thick. If you put too many chocolate chips, this step can be a little tricky as you see in the photo. 8.Bake for 20 minutes then cool on a rack.