Old 05-11-2003, 07:15 AM
Join Date: Dec 2002
Posts: 5,478
Can Jello be *re*set?

Okay, I screwed up. I was supposed to let the jello 'thicken' before adding fruit and pouring into the mold. I got distracted, and when I remembered the jello it was already completely hard.

I was wondering: I know Jello melts when it gets warm, but is it reset-able? Could I microwave this solid lump, stir in the fruit, and then have it turn back into a solid in the fridge?

Does anyone know? Or, if I try, will I be forging new grounds for the world of science?
Old 06-12-2017, 10:51 AM
Join Date: Jun 2017
Posts: 1
Hello, 2003. Here's the answer for your question so future googlers will know: yes, you can reheat jello and re-set it but make sure you do it on a low heat since there's sugar in it.
Old 06-12-2017, 11:59 AM
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Location: Tysons Corner, VA, USA
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Why would it have to be low heat? You can boil it and no harm will come to the sugar, since that's how you make it the first time around.
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Old 06-12-2017, 12:05 PM
Charter Member
Join Date: Jan 2000
Location: The Land of Cleves
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OK, before anyone comes in with the zombie jokes, that was the good kind of bump, one that adds new relevant information to a thread. Welcome to the SDMB, findokf, please stick around and contribute more.

EDIT: And of course someone named CookingWithGas would advocate for boiling something

Really, I think that how you heat it, and how much, will depend mostly on what sort of container it's in.

Last edited by Chronos; 06-12-2017 at 12:06 PM.
Old 06-12-2017, 12:51 PM
Join Date: Jul 2012
Location: Torrance Ca
Posts: 7,640
Gelatin is an animal protein, the same thing you see that looks like gelatin when you put cooked meat in the fridge and it gels. I use it for glue and reheat it many many times and it always resets, however I don't have sugar in mine so you may not want to get it too hot.
Old 06-12-2017, 01:00 PM
Join Date: Jul 2005
Location: Minnesota
Posts: 14,561
Actually, I'd be more concerned about boiling the gelatin. 212F is at the upper range of gelatin's tolerability. Higher heat (which is going to be possible since your mixture has sugar in it) or holding the liquid at 212F for an extended period is going to weaken the gelatin's ability to firm up.
Old 06-12-2017, 02:59 PM
Join Date: Dec 2016
Posts: 1,734
Originally Posted by CookingWithGas View Post
Why would it have to be low heat? You can boil it and no harm will come to the sugar, since that's how you make it the first time around.
Perhaps it crystallizes with reheating?
Old 06-12-2017, 04:58 PM
Join Date: Mar 2002
Location: Trantor
Posts: 11,765
Sugar will carmelize if heated too hot, so I would be careful heating.

Did you need answer fast?
Old 06-12-2017, 05:09 PM
Join Date: Feb 2015
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Sugar carmelizes at 340 F. If you're heating a solution of gelatin in water, it can't possibly get that hot unless all the water boils away.
Old 06-12-2017, 05:59 PM
Join Date: Dec 2010
Posts: 6,865
If you're heating sugar dissolved in water, the water will basically never exceed the boiling point. But the starting material is solid gelatin, so it might be possible to heat the bottom of the pan past the boiling point before the rest of it melts. Certainly this could happen if you heat the pan first and dump in jello chunks later.

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