They are so delicate; I imagine they are difficult to package. But they are SO easy to make, why bother with packaged ones anyways? CCNY gives a great recipe; I would only suggest cooking them for 15 minutes, making sure the oven is properly pre-heated before putting them in. You need very little oil, cook them on parchment, and make sure they are not touching. Drain on a paper towel.

And definitely use fresh kale. Those pre-packaged lettuce/kale/spinach/whatever need to be washed anyways (even if they are pre-washed) and they are never as fresh as un-packaged greens.

It's hardly any trouble at all, especially if you have 2 cookie sheets going at he same time (because you do have to bake them in batches because they cannot touch).

I made a mountain of them from one bunch of kale yesterday...they are all gone today!