BAKE GRILLED CHEESE BETWEEN 2 BAKING SHEETS. The bread turns out crispy, the inside is gooey, and you can make a bunch at once. Butter outsides of bread and assembled the sandwiches on the first tray. Put second tray on top (facing the normal way – you don’t want any space between the bread and the top tray). Put it in the oven at 350 F (180 C) for about 10-15 minutes, depending on how Brown you like the bread.