Find recipes for Favorite Crab-Stuffed Mushrooms and other Course recipes. Get all the best recipes at . Recipe directions: In a large saucepan, melt 1 tablespoon butter. Stir in flour until smooth. Gradually stir in milk. Bring to a boil over medium heat; cook and stir for 2 minutes or until thickened. Reduce heat; stir in the bread cubes, Worcestershire sauce and onion.