The deviled eggs have a pleasant bit of heat to them from the jalapeno pepper, the bite of the red onion, and the sprinkling of chili powder on top. However, by no means would I call them 'spicy'. If you want to remove all traces of heat, I suggest leaving out the jalapeno pepper and rather than using chile powder, use smoked paprika instead. If you're a heat seeker, swap out the jalapeno for a serrano chile pepper which are much hotter and will definitely transform the overall spice level from mild to medium-hot.