Yes. Coffee grounds are simply the ground up seeds found inside the berry of the coffea plant, so eat up! Even after the beans have been ground and extracted into your favorite coffee beverage, they still contain plenty of caffeine and are perfectly digestible.
Before people learned to brew coffee, folks were eating the beans to get that coffee boost. Today we eat straight coffee beans through all sorts of preparations. Chocolate covered espresso beans are quite popular and pack quite the kick.
Eating coffee beans has even more effect than drinking coffee because not all of the caffeine is extracted through your brewing process. According to the Journal of Agriculture and Food Chemistry, leftover coffee grounds from filter and espresso-type coffeemakers are especially abundant in antioxidants. Plus, you'll get all the benefit of the dietary fiber that's not present in your morning brew. Enjoy!