"I followed the recipe exactly, except that I used a hand held mixer instead of mix master. I do realize that the directions say to use a stand mixer, however, they don't say that you cannot use any other type of mixer. The dough was very crumbly.And although with a lot of effort & determination I was able to salvage half of the dough & make a decent batch of cookies, I would have appreciated knowing that a stand mixer is the only type of mixer that will work. Other than that... the cookies were delicious!