For a dryer, firmer cookie, flatten the dough more than what is illustrated in the photos and bake a little closer to 8-10 minutes. I like mine soft, so I keep the cookie relatively thick and I only bake about 6-7 minutes. The dough is also sticky, so you’ll want to roll the mixture into balls and flatten them right away. The longer the batter sits, the stickier it becomes. Even a few minutes can make a difference. I found that out the first few times I made them!