Heat oven to 350° F. Lightly grease a 10-inch Bundt pan. Combine bacon, Parmesan cheese and onion; set aside.
Cut biscuits into fourths; dip each piece in butter, and layer one-third in prepared Bundt pan. Sprinkle half of bacon mixture over biscuits; repeat procedure, ending with biscuits.
Bake for 40 minutes or until golden. Cool 10 minutes. Invert onto a serving platter. Serve immediately.
Servings: 4 to 6