Make sure to pick over the crab meat carefully to remove any small shell fragments for a smooth texture. Don’t overfill the mushroom caps to prevent the filling from spilling out during baking. Using fresh mushrooms is best, but if you only have pre-packaged, ensure they are firm and not slimy. For extra flavor, add a pinch of cayenne pepper or a dash of hot sauce to the filling. Use a light hand when mixing the crab filling to maintain the delicate texture of the crab meat. Let the mushrooms cool slightly before serving to avoid burning your mouth on the hot filling. Variations include swapping mozzarella for Parmesan or cheddar, adding fresh dill, chives, or tarragon, incorporating jalapeños or red pepper flakes for heat, topping with panko breadcrumbs mixed with melted butter for a crispy crust, using vegan substitutes for dairy-free versions, or swapping crab meat with cooked shrimp or lobster.