substitute molasses for maple syrup

I would definitely choose a different recipe--ginger snaps, as was already suggested, perhaps a pumpkin muffin or ginger cake, or even baked beans. I wouldn’t try to substitute it for maple syrup. If you don’t have that much, I like molasses on bread with butter.

Molasses also has a fair bit of acid in it, which will interact with the leavening agents in the recipe. I would just look for a good molasses cookie, or ginger cookie recipe with molasses in it. There are several here on Food52. ;o)

I would go ahead and say no-there's no one to stop you from doing it, but it would be a really radical departure, and cookies that use maple syrup are (in my experience) pretty specifically going for that flavor.

You can, but it will (obviously) change the taste, add bitterness, and be less sweet. How much maple syrup is in the recipe? Is there sugar also?