These cookies are finished by hand while still hot, so don't bake them all at once. Also, be careful not to burn yourself!
Using thick paper, cut out a 2- to 2½-inch circle. Also prepare about 20 fortunes to place inside the cookies. Preheat the oven to between 330 and 340 degrees F.
Add the sugar and egg whites to a bowl and beat together with an electric mixer until they turn white. Add in the butter in little by little, constantly mixing.
Sift the flour and matcha together, and then add to the egg whites.
Spoon the dough onto flat surface and spread it into a circle. Use the paper circle as a guide for size and shape, and cut out about 20 circles. Place the dough rounds onto a baking sheet.
Place the cookie in the oven and bake until the edges of the cookie just start to change color, about 3 minutes.
While the cookie is still hot, place a fortune in the center of the cookie and shape the cookie around the fortune. Make sure to leave space in the middle and not to press the cookie against itself. Let cool.