In a large skillet, cook beef over medium heat until no longer pink; drain. Add the barbecue sauce, onion and brown sugar; set aside.
Separate dough into 10 biscuits; flatten into 5-in. circles. Press firmly onto the bottom and up the sides of greased muffin cups. Spoon 2 tablespoons of beef mixture into each cup; sprinkle with cheese.
Bake at 400° for 10-15 minutes or until biscuits are golden and cheese is melted.