Ah, the freezer hero. If you’re baking from frozen—never thawed, just a block of cold ambition—you’re looking at 60 to 70 minutes covered at 375°F, then another 15 to 20 minutes uncovered. That’s nearly an hour and a half. Bring a book.
Pro tip: if you’re cooking a frozen lasagna, add 15 minutes to every step and check with your trusty knife test. The center is a slowpoke and likes to stay cold just to annoy you.
And if your lasagna is thick—like, bigger than the pan you bought—add another 10 to 20 minutes. Think of it as lasagna’s awkward phase. It’ll get there.
how long does lasagna take to bake? - Test Food Kitchen
