Preheat oven to 425degrees. Clean and pat dry chicken. Pour half the can of beer (or sprite or coke) out, and place can in in the roasting pan. Perch the chicken ON the can (making like a "tripod" with the chickens legs and the can).
Mix together Paprika, Onions powder, salt, pepper, and brown sugar. Rub all over the chicken. Pour 1cup of chicken stock in the bottom of the pan. Place pan in the oven and roast until done.
Remove chicken to platter to sit. Use flour to make gravy. Serve with mashed potatoes.