A girl in my ward made these for a primary party one Christmas and the recipe became a party favorite. KellyB also makes them and she "kicks it up a notch" by sprinkling a generous amount of powdered parmesan cheese on top before browning.
25-30 large button mushrooms
1 lb. ground sausage (I buy Jimmy Dean Original)
1 (8 oz.) pkg. cream cheese
Wash and stem mushrooms. Fry sausage, then drain. Add cream cheese to sausage and stir until it melts and is well incorporated. Scoop a small amount of meat mixture into the center of the stemmed mushroom. Arrange on cookie sheet and bake at 350 degrees for 15-20 minutes or until nicely browned. Serve warm. Can sprinkle powdered parmesan on top before browning.