I recently purchased a pre made casserole and the instructions stated that it should be placed in a 440* oven for 55 minutes. This seems like a very hot cooking temperature to me - am I mistaken? Thanks.

4 Answers 4


Assuming the packaging means 440°F, no, that's not that insane. Casseroles are heavy, with a lot of liquid, so it takes a lot of heat to heat them up, especially if this is a frozen premade casserole. It is on the high side, so you might want to make sure it's not browning too much on the top (cover with foil to shield if necessary) or burning on the bottom. You can always reduce the heat partway through if you have to; it'll just take longer.

  • 1
    Except 440 is such an odd temperature to specify; most recipes in F would specify 450.
    – SAJ14SAJ
    Commented Feb 4, 2014 at 1:40
  • @SAJ14SAJ Yup, definitely, but it seems more likely that it's a typo of 450 than 350, so worth answering based on what's in the question. (And I doubt it's meant to be 440C/825F!)
    – Cascabel
    Commented Feb 4, 2014 at 5:21
  • I'd be worried to cook a frozen casserole at a temperature over 400...Seems likely the outside would get dry and unpleasant by the time the inside got hot. I'd be more likely to stick to 350/325. Commented Feb 4, 2014 at 15:41
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    @SAJ14SAJ, 440F is an odd temperature for a recipe developed in Fahrenheit, but it's a reasonably close conversion of 225C.
    – Mark
    Commented Feb 18, 2015 at 8:40

If it's a thin item like a shallow casserole, it could make sense especially if the ingredients are already cooked. Also, is it a convection oven?


I also suspect this is a typo of 350. Especially given that the casserole is frozen, there's a high likelihood of the outside burning while the inside is still cool at 450. At 350, it will all cook and warm nicely.


Broil Temps are up to 550F. If you have a Self Cleaning oven, the temps can go to 850F for that function. Any temp that exceeds 600F must have an automatic door lock to prevent you from opening the door and being burned.

Hop that helps.

  • 1
    Gary, while true how does this answer the question about a casserole? I strongly recommend that you take the tour and visit our help center to get a better understanding of how this site works. That said, welcome to Seasoned Advice!
    – Stephie
    Commented Feb 24, 2016 at 13:27

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