I have been making the MMF recipe from the site. It mixes beautifully, but once I go to roll it it becomes very crackled and crumbly. Especially if I am trying to make any design with it. Can someone please help me!! I am going to be trying to use it again soon, but don't know what to do. I would really appreciate any ideas or suggestions.

Try adding some shortning while in the mixer or when you are kneading it.

what I do is to add a little water (drops) , heat it up a little bit then knead.