How To Heat Frozen Cooked Pizza Slices. Preheat your oven to 450 degrees fahrenheit with the baking sheet in the oven. Place the cold slice of pizza directly onto the skillet and heat it for just a couple of minutes.
How to thaw frozen pizza. Before baking the pizza, throw on more pepperonis, mushrooms, peppers or whatever you have on hand. Place frozen cut slices of pizza directly on center rack, no pan or sheet.
