Use mushrooms with caps that are 1-1/4 inches to 1-1/2 inches in diameter.
Mushrooms can be stuffed several hours in advance. Refrigerate until ready to serve. Bake, uncovered, at 400°F for 20 min. or until heated through.
How to Easily Stuff Mushrooms
When preparing mushrooms for stuffing, use a melon baller to carefully scoop a little mushroom flesh from each mushroom cap after removing the stem. Then, use the melon baller to easily scoop the filling mixture into the mushrooms.