The auto-ignition point of paper/cardboard (where it will burn) is around 450F. Also make sure there is no plastic wrap/plastic pieces to keep the lid from touching the pizza etc in the box when you put it in the oven. I would personally heat the pizza in an open box @350 degrees for 10 minutes or so.
Correspondingly, what is the best way to warm up pizza?
Or heat a skillet on medium-high for a minute, add the pizza, cover loosely with a lid, and cook 2 to 3 minutes. For larger amounts, heat a foil-lined cookie sheet in a 450°F oven until hot (high heat makes the crust crispy). Arrange slices on the sheet and heat 10 minutes, or until the cheese is bubbly.
Can you reheat Pizza Hut pizza in the oven?
How to Reheat Pizza Hut Pizza. While your first thought to reheat the pizza may be to use the microwave, you may want to think twice. The microwave can make crust chewy and tough. Instead, try using an oven to reheat your leftover pizza and retain its flavor and consistency.
How do you reheat pizza on the stove?
Anthony Falco, Roberta's head pizza maestro, recommends putting your slice in a non-stick skillet on medium-low for a couple minutes. Once the bottom is crisp, add a couple drops of water to the pan, turn the heat to low, and cover with a lid. In about a minute, you'll have fluffy crust and melted cheese.