Prep: Sift the flour, baking powder, sugar and maccha into a bowl
together and preheat the oven to 160 degrees Celsius. (This is a good
time to bake the walnuts: they shouldn’t take more than 15-20 minutes.)

1. Put butter in a bowl with the egg and mix with an egg mixer.
2. Slowly add powder (maybe in 3 goes) and mix until the dough is no longer powdery.
3. Mix in the chestnuts and white chocolate. (Make sure the walnuts have had enough time to cool down, otherwise they will stick to and mess up the white chocolate.)
4. Using two spoons, spread the mixture into cookie circles on a cookie sheet.
5. Bake for 15 minutes at 160 degrees C

Options: Without adding eggs, one can make the cookies to the size of one’s palm and the cookies turn into a shortbread like texture that is yummy in its own way. Also, you can increase maccha to taste.