I have an older version Bosch and for making cookie dough, I bought an attachment that is called “Cookie Paddles”. This is instead of the whip attachments that the device comes with standard. This will make a good batch of cookie dough, probably with 2 cups of margarine if you want to make a double batch.
I know they came out with a new model and I know that the last time they came out with a new one it was definitely not as strong as the old one, which has a mechanical drive motor as opposed to the new ones that have an electronic motor. Unfortunately I believe they stopped making the old one, so if you find one, even used, let’s say at a moving sale here in Jerusalem, then I would grab it. I’m even thinking about it for my daughters since it’s so invaluable.
The metal bowl and its attachment is what lets you make the larger batch of dough to take challah with a bracha. I use the smaller plastic bowl with its dough hook and take challah without a bracha.