If you’re trying to figure out how to reheat a bloomin onion, you’ve come to the right corner of the internet; I’ve got you! There’s nothing better than a golden, crispy bloomin onion with its pretty pull-apart petals; it’s just such a crowd pleaser.
I love serving them with a bunch of different dips and sauces; it’s always fun to see which dip is the most popular.
Honestly, I can’t bear wasting these beauties, which take a fair amount of time and effort to make.
Anyway, I’ve put together a few ideas for you on how to reheat and get the best out of your leftover bloomin onions.
How to reheat bloomin onion in a microwave
So this is probably the easiest and quickest way to reheat bloomin onion, but it’s not going to bring it back to its original glory.
Just saying, don’t expect too much as the microwave will often soften the onion up a bit instead of crisping it. Having said that, it’s still a yummy snack.
You could serve it as a side with some grilled meat and salad.



Here’s the how-to:
1. Find a piece of clean cardboard and fold it the way you would a paper fan, or like an accordion.
2. Lay the onion on the cardboard – it should lie as flat as possible.
3. Place the onion and its cardboard base on a microwavable plate.
4. Heat on medium to reheat the bloomin onion for a few minutes.
5. Serve and enjoy as soon as it is hot and as crisp as possible.
The little cardboard platform raises the onion and prevents it from getting steamy and soggy.
How to reheat bloomin onion in the oven
So, while the microwave method is built for speed, reheating your bloomin onion in an oven is not. It will give you a lovely fresh leftover bloomin onion, though, so it’s a worthy choice.
Check out these steps on the oven method:
1. Preheat your oven to around 425 °F/218 °C.
2. Place a wire cooling wrack onto a baking sheet or tray.
3. Place the onion onto the tray and warm it up for 10-15 minutes, depending on the size of the onion.
4. Remove the onion and serve with your favorite sauce!
As I mentioned, this isn’t the fastest way to reheat a bloomin onion, but it’s one of the best ways for sure.
How to reheat bloomin onion in the air fryer
If you happen to have an air fryer, this is a great way to reheat a bloomin onion.
Here’s how:
1. Brush or spray a little oil onto your bloomin onion.
2. Pop the onion into the air fryer basket.
3. Heat it to about 400°F/204°C
4. Remove the onion and enjoy the crispy joy of this onion the second time around.



How to store bloomin onion
As this post leans into not letting a single petal of your bloomin onion go to waste, it’s only fair that we talk about how to store one.
Make sure you let the onion cool to room temperature.
Remember that food shouldn’t be left out overnight and stored the next morning to reheat.
Here’s what you’re going to do:
- Cut away any messy bits.
- Place the onion in a glass bowl or container.
- Place a paper towel around the onion to prevent it from getting soggy.
- Cover the container with a lid.
- Pop into the fridge until you’re ready to reheat your bloomin onion.
Reheating tips and tricks
You can use some sneaky tips and tricks to get the best out of your reheated bloomin onion. This is what I do to enjoy my leftover bloomin onion as much as I did the first time.
- Use cardboard when reheating in the microwave, as it will absorb any excess oil to keep it as crisp as possible.
- Make sure you seal the lid tightly on the storage container to keep it fresh and stop it from getting too soft.
- Choose the microwave method only if you don’t have 1-15 minutes for the oven or fryer method.



Bloomin onion recipe ingredients
While I’m on the topic of how to reheat a bloomin onion….I thought I might as well share my go-to bloomin onion recipe! I mean, it’s seriously yummy and too good to keep to myself.
Ingredients for the onion:
- Large sweet white onion
- 1 cup all-purpose flour
- 2 tsp paprika
- 1 tsp white sugar
- 1 tsp garlic powder
- ½ tsp black pepper
- ½ tsp chili powder
Ingredients for the batter:
- ¾ cup all-purpose flour
- 1 tsp garlic powder
- 1 TBS paprika
- ¾ tsp black pepper
- 1 ½ cups corn starch
- ½ tsp salt
- ½ tsp garlic salt
- 1 ½ cups beer



Bloomin onion recipe steps
Here are the steps to cooking your bloomin onion.
This is honestly such a crispy, crunchy treat, it’s not something I’d make every day, but it’ll get the party started when there’s a special occasion.
Step 1:
Heat your oil in a pot to around 375°F/190°C
Step 2:
Mix your seasoning ingredients in a bowl until everything is combined.
Step 3:
Cut the root end off your onion. Slice around 12-15 slices into the onion, leaving around an inch before the root end – make sure you don’t cut all the way through.
Remove a couple of the inner petals from the onion.
Step 4:
Dip your onion in the seasoned flour mix. You’ll want to open up the onion a little and make sure the flour has settled between the petals.
Step 5:
Place all the dry ingredients for your batter into a bowl. Whisk in the beer until it’s smooth and lump-free.
Step 6: dip your onion into the batter. Fry it in the oil for 6-8 minutes until golden brown and crisp. Place the onion onto a paper towel for a minute to let the oil drain off, and serve hot with a selection of sauces. Sour cream and horseradish sauce is my favorite!



FAQ
Can you microwave a bloomin onion?
While it’s not my first choice, you can reheat a bloomin onion in the microwave.
It’s a good idea to create a little cardboard fan and prop the onion on top of the platform to stop it from steaming underneath.
This will give you the best shot at a crispy onion.
How long is a blooming onion good in the fridge?
If you store it wrapped in a paper towel, sealed in an air-tight container, and the fridge, it’ll keep for 4-5 days.
What to do with leftover bloomin onion?
Reheat it and live the party all over again!
You can also warm it up as a side to grilled meat or chicken or use it as a burger topping.
Wrapping it up!
Beautiful bloomin onions are too delicious to let one petal go to waste.
They are also a fair amount of work to make with the layering of the seasoning and batter, so definitely give your leftovers a second go.
I hope you’ve enjoyed my tips on how to reheat bloomin onion.



How To Reheat Bloomin Onion in an Oven
Equipment
- Oven
- Wire cooling rack
Ingredients
- 1 Leftover bloomin Onion
Instructions
- Preheat your oven to around 425 °F/218 °C
- Place a wire cooling wrack onto a baking sheet or tray
- Place the onion onto the tray and warm it up for 10-15 minutes, depending on the size of the onion
- Remove the onion and serve with your favorite sauce!