The kids made this recipe with me once, and from the second time onwards they did it by themselves. The second time, they asked for a lot of help, so the third time, when they wanted to make cookies, we made a deal: they couldn’t ask for help. This was their third attempt, and the cookies are getting better and better.
You can find the recipe we used here (except we now grate an apple in it, and this time I had some fruit going bad so I pureed it for them in advance).
Here's the result: