how long to cook frozen hamburgers in oven
Cook frozen beef patties (hamburgers) in the Ronco Showtime Rotisserie Oven for at least 20 minutes for a fully cooked, juicy burger (no pink). 30 minutes will give you well d â¦ one and kinda dry, depending on the thickness of the burger. I used the 1/4 lb frozen patties and 20 min. was perfect.