If your cookies didn't spread much during baking, it could be that you used too much flour. To be accurate, weigh the flour to 190g. If using measuring cups, do not pack it in - just spoon it in and level it off with a knife. It could also be due to the size of the cookie dough balls. This recipe makes about 14 cookies. If the dough balls are too small, then they will bake too quickly and won't have time to spread. If you want to make smaller cookies, I recommend reduce the flour by 2 tablespoons (18g).