In a big skillet, cook smoked bacon till almost crispy. Drain fat on paper towrls, set aside.
Clean your mushrooms and remove the stems, discard stems, put tops aside.
In a bowl, stir together cream cheese snd swiss cheese. Stir in the bacon and add garlic powder. Spoon mixture into the mushroom tops and place them on a lrg baking sheet butter coatedwith butter. Bake at 325 degrees for 30 min or until the mushrooms are tender . Cool slightly and serve