I would recommend sprinkling it all over and giving it a toss right on the pan. Then, let it cool completely. Hope this helps and my apologies for the delay—I've been on maternity leave these last few months and sometimes fall a bit behind on comments!

Do you just sprinkle it all over or actually mix it in then spread out out again?

Hi, Elizabeth! You'd want to add it right when you pull it out of the oven as it should have enough moisture still (it continues to crisp as it cools) to encourage the matcha to cling to it. Hope this helps and enjoy!