Onion-Beef Muffin Cups Recipe

In a large skillet, cook onions in butter over medium heat for 10-12 minutes or until very tender. Remove and keep warm. In the same skillet, cook steak for 2-3 minutes or until no longer pink. Return onions to pan. Stir in the flour, brown sugar and salt until blended; gradually add broth. Bring to a boil; cook and stir for 4-6 minutes or until thickened. Separate biscuits; split each horizontally into three portions. Press onto the bottom and up the sides of eight ungreased muffin cups, overlapping the sides and tops. Fill each with about 2 tablespoons beef mixture. Combine mozzarella cheese and 1/4 cup Parmesan cheese; sprinkle over filling. Fold dough over completely to enclose filling. Sprinkle with remaining Parmesan cheese. Bake at 375 ° for 12-15 minutes or until golden brown. Let stand for 2 minutes before removing from pan. Serve warm.