There are a few different tips and tricks to making the best cookies, but my top three would be: use really good butter, don't overwork the dough, and don't skip the refrigeration steps. High-quality butter always has a better flavor, and a better texture, and will make the most perfect buttery matcha cookies. When you are careful and methodical with the dough, it will result in light and crunchy cookies. Chilling the dough will help the butter do its job in the oven, and will keep the cookies from spreading and changing its texture. Follow these key tips and you'll have a perfect cookie!