When Making this dish I always use imitation crab meat, it is cheaper and in this dish not noticeable. (Update: I have since found out that not all imitation crab is equal. The imitation crab I get comes from the seafood counter and looks like shelled crab legs.).
Wash and remove stems of mushrooms, leaving a little dish in the mushroom where the stem used to be.
In a bowl mix equal parts crab to cream cheese. Season with Old Bay Seasoning.
Stop eating the filling!
Spoon generous amounts of filling into the mushroom caps.
Stop eating the mushrooms!
In a muffin tin, spoon a generous amount of butter into each cup.
Heat tin in oven until butter is melted.
Place stuffed mushroom caps into each muffing tin stuffing side up.