You can add dried fruit or chopped nuts for more crunch but they are so good just as they are with chocolate! (nutritiousdeliciousness.com)
Or add all three for even more crunch and flavor. (catchingseeds.com)
Or, if you like them with a bit more crunch, leave them in the oven for another 5 - 10 minutes and you'll have a lovely crisp ginger cookie. (swoonfood.com)