Can you Microwave Uncrustables? (Here’s The Truth)

Tell me you are living with a picky eater, without actually telling me you are living with a picky eater. 

Your search for “Microwaving uncrustables” kinda gave it away. I have a very picky 6 year old too, so I can imagine your predicament. Anything not approved by little miss food police doesn’t make it near her mouth. Uncrustables are the only exception to a sandwich that she will eat. This is why I keep plenty of boxes around in my freezer for tough days to tide me over.

But how do I get them from frozen solid to ready-to-eat in a jiffy? Do I microwave or let them thaw outside, as per the box’s instructions (do people even do that, it’s so time-consuming)? 

Well, this is exactly what I will be discussing in this article, keep reading and find out the best way to get your uncrustables ready to eat in no time.

Can you microwave Uncrustables?

Smuckers, the brand that makes Uncrustables, actually doesn’t recommend microwaving them. Mainly because the filling inside them can get very hot compared to the outside and be a potential burn hazard when you bite into them.

However, many people seem to have done so (with varying degrees of success might I add). The internet nevertheless, remains divided as to whether it’s a good idea to microwave uncrustables or not. 

How to microwave uncrustables?

Even though the manufacturer itself doesn’t recommend microwaving uncrustables, however, if you consider yourself daring enough to give it a try, be warned. It’s going to be a hit-and-miss situation.

Here’s how you can microwave them:

  1. Remove the uncrustables from the plastic packaging.
  2. Wrap a damp paper towel around the uncrustables so the microwave heat doesn’t dry out the bread.
  3. Place the uncrustables on a microwave-safe plate and microwave on MEDIUM heat for a maximum of 60 seconds.
  4. Turn over and heat for 10-15 seconds on the other side to heat evenly.
  5. Let them rest for 1-2 minutes before biting in. This step is extremely important because the filling inside can get hotter than the bread outside and cause burns.

Why shouldn’t you microwave Uncrustables?

I’ll give you two reasons why I don’t think microwaving uncrustables isn’t a good idea.

  1. The fillings, especially the ones with jams and jellies, heat faster than the outer bread crust, which means they will get runny and hot like molten lava when they are heated. Bite into one at this stage, and you risk burning your tongue and mouth.
  2. The bread can get hard and tough when heated in the microwave. Or another scenario that can happen is that the runny filling could be soaked up by the bread, making it soggy and not pleasant to eat at all.

3 Better alternatives to thaw Uncrustables:

So if using a microwave isn’t a foolproof method to defrost uncrustables quickly, what other options are out there?

The manufacturer’s recommendation is to keep uncrustables outside at room temperature and they will thaw within 30-60 minutes. But what if you don’t want to wait that long and want to eat one right now? What other options can you explore?

  • Keep them in a warm place: You can always place them in a window where there is plenty of direct sunlight. Or, if it’s winter, I find it particularly helpful to place them next to the heating vents, on top of a running dryer, or even blast them for a few seconds with my hair dryer.
  • Use your body heat: You could also press the uncrustables packet gently between your warm hands or even rub them to create a bit of heat from friction. If you don’t prefer your hands to get cold you can even keep them on top of a heating pad or a hot water bottle.
  • Use warm water: Thawing them by placing them in a bowl of warm water is also an option. But make sure you double bag them by placing the unopened packet in a Ziploc bag before keeping it in the bowl of water. Otherwise, you will end up with a soggy inedible sandwich.

How long can Uncrustables sit out before going bad?

According to the FDA, any food that remains outside for more than 2 hours develops a risk of being contaminated.

Since most uncrustables come filled with either deli meat or jams and nut butter, they have a high chance of going bad very quickly. Therefore it is advisable to consume them as soon as possible after they are done defrosting.

If you are one of those people that like to plan ahead by keeping a stash of Uncrustables thawed and ready to eat then I would recommend you defrost them in the refrigerator overnight rather than leaving them on the counter.

Also important to remember is that any thawed uncrustables shouldn’t be refrozen but consumed immediately.

How Long Can Uncrustables Last In The Fridge?

Thawed Uncrustables can be refrigerated for up to 24 hours. 

But don’t just place the uncrustables directly on a plate in the refrigerator because that may dry out the bread. A better option would be to keep them in an air-tight box inside the refrigerator.

4 Ways to Level up Uncrustables

The tiny but mighty sandwich. Did you know that you don’t have to eat these sandwiches as-is from the package? Try these neat tricks to level up your uncrustables game.

Fry them

Try this churro meets donut inspired recipe where you can get the goodness of a filled donut with the cinnamony goodness of a churro. 

Simply fry them (I love the PB & J or the hazelnut-chocolate ones for this) in canola oil at 375 degrees Fahrenheit (an air fryer will work just as well) until lightly golden. Then toss in cinnamon sugar and voila, a yummy treat that’s ready in no time.

French Toast them

Instead of dipping your usual plain bread in the french toast mixture, add your uncrustables to the egg-milk mixture. Fry them in some butter. Top with some cream and you’ve got a perfectly indulgent Sunday breakfast ready.

Pop them in a Toaster

What’s crispy on the outside and warm and gooey on the inside? It’s an Uncrustable that you just toasted in your toaster. A genius and simple spin on boring old breakfast sandwiches.

Breakfast Uncrustables Waffle

Dip your Uncrustables in waffle batter and fry it in oil. Top with honey, maple syrup, or even caramel sauce. And you have another crunchy breakfast option ready that is sure to be a hit with kids.


Are Uncrustables suitable for school lunches?

Yes, Uncrustables are perfectly suited to be given as school lunches. 

In fact, they make lunches all the more convenient. Simply add a frozen Uncrustable straight from the freezer to the lunch box. Within 30-60 minutes it will defrost and be ready to eat by lunchtime in school.

Can you refreeze uncrustables?

No, it’s not recommended to refreeze any thawed-out uncrustables because of two reasons:

  • Ice crystals can develop on the bread which may turn it soggy when you defrost it the next time.
  • There can be a potential chance of bacteria multiplying during the thawing- refreezing time which may spoil the fillings inside.

Wrapping up

Smuckers Uncrustables are a great snack (or even a breakfast option) when you are short on time and have to deal with picky eaters. 

However, microwaving them is not the best way to eat them because it usually ruins them. Look for alternative ways to quickly bring them to room temperature.