In a medium size bowl add Crabmeat, herbs, and pepper, and mix in mayo and 1/4 cup Parmesan cheese until well combined. Refrigerate after mixed
Wash the mushrooms and remove stems, spoon out gill and that you can fill the mushrooms. Fill mushrooms with rounded teaspoonfuls of filling, and place in an ungreased baking dish.
Bake for 20 minutes, serve hot. Serves 6