Preheat oven to 350 degrees F (175 degrees C). Generously coat a 9x13 inch baking dish with bacon grease.
Mix corn bread mix with milk and egg according to package directions. In a medium skillet over medium heat, cook onion and bell pepper in 1/2 cup butter until tender. Stir onion mixture into corn bread batter. Pour into prepared 9x13 inch pan.
Bake in preheated oven 35 to 40 minutes, until golden brown. Cool completely. Increase oven temperature to 375 degrees F (190 degrees C).
Processed cooled corn bread in a food processor until soft and mushy. Pour into a large aluminum roasting pan. Stir in herbed stuffing mix. Stir in chicken broth, a can at a time, until mixture is well moistened, but not soupy. Stir in poultry seasoning and baking powder. Dot with remaining butter, and press butter down into dressing.
Bake in preheated oven until puffed and golden, 30 to 45 minutes.
