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Roasting Frozen Vegetables {How to Roast Frozen Vegetables}

This is the ultimate guide to Roasting Frozen Vegetables. If you’re asking “can you roast frozen vegetables”, you’ll be so excited to know that it is possible. This is the best resource for helping you make tasty and healthy vegetable side dishes using all frozen veggies! Oven roasted frozen vegetables are delicious and will save you so much time and money. Learn how to roast frozen vegetables in this comprehensive how-to guide.

four different dishes from roasting frozen vegetables

Can You Roast Frozen Vegetables?

Yes!! The day I realized that not only could you roast frozen vegetables, but that they were absolutely delicious, well I do believe my head exploded. And there may have been tears of joy. Who is to say for sure.

Roasting frozen vegetables is the ultimate in convenient and healthy “fast food”. Someone else already did the washing and chopping. All you need to do is grab a baking sheet, pick some seasoning, and get ready to save a boatload of time and money.

Three Takeaway Tips For Roasting Frozen Vegetables

  1. Fully preheat the oven. It is so tempting to start cooking the veggies while the oven is preheating, but doing so will give you soft and mushy (smushy) vegetables instead of perfectly roasted veg.
  2. Preheat the pan and oil. Add a tablespoon of your preferred cooking oil to the pan and place it in the oven while it preheats. A hot pan and oil will give the vegetables a jump start on the roasting process.
  3. Don’t crowd the pan! Give the veggies plenty of space to roast. Too much veg all smushed together will cause the water to steam instead of evaporating. Steaming = mushy vegetables. Try using two or even three pans if you want to roast larger batches.

Why Roast Frozen Vegetables?

The convenience of frozen vegetables cannot be understated! The ability to open up a bag of already washed and prepped veg can be a total game changer when it comes to putting healthy food on your table (related: Easy Healthy Meal Prep).

Frozen vegetables have gotten a bad rap for being inferior to their fresh counterparts, but that just isn’t true anymore. Thanks to blanching and flash freezing, in many cases frozen vegetables can actually be just as healthy as fresh.

When vegetables are frozen at the peak of freshness, it locks those nutrients down like Fort Knox. Whereas “fresh” veggies may have traveled thousands of miles before ever reaching your market.

And when it comes to cost you cannot deny the incredible savings you get from using frozen vegetables. Most organic frozen veggies are incredibly affordable and are usually more economical than their fresh conventional counterparts.

Additionally, buying frozen veggies allows you to enjoy out of season produce at a fraction of the price. Oh, and did I mention that in many cases, frozen veggies actually roast faster than fresh? Hollah!

Frozen, straight from the bag to your pan. It doesn’t get any easier than this my friends.

What Type of Pan is Best For Roasting Frozen Vegetables?

The humble rimmed baking sheet is my go-to for making roasted vegetables. With low sides, it keeps the vegetables in place while still allowing air to circulate around each piece.

Unlike many people, I don’t recommend using parchment or foil on your baking sheets when roasting frozen vegetables. I believe it prevents a great sear from happening and gives the veg too much opportunity to steam instead of roast.

Pro tip: if your roasting pan has any stuck on food, save your time and don’t bother scrubbing it. Add some water to the empty pan and pop it back into the warm oven for 10 minutes. The food will come right off of it when rinsed. Then clean as normal; easy peasy!

If you want to make a smaller batch, want to save on dishes, and love a little extra sear on your veg, than using cast iron skillets are the way to go.

sliced veggies on a sheet pan for roasting frozen vegetables

How Long Does it Take To Roast Frozen Vegetables?

Each veggie has their own recommended cook time, so I created this handy little printout to help you rock your dinner game. Keep in mind that each oven is different and may cook the vegetables at different speeds. I recommend checking on the veggies at the halfway point of the suggested cooking times.

A printable guide for roasting frozen vegetables

Click here to print this cooking guide for roasting frozen vegetables.

How to Season Roasted Vegetables

Most veggies simply need a fat (olive oil, avocado oil, coconut oil, or ghee) and a good pinch of kosher salt for the best roasting results. Typically, I use 2 tablespoons of olive oil per pan of veg.

One tablespoon gets preheated with the pan, and the other is tossed with the veggies in a bowl before everything else goes on the pan.

Typically I only add salt and other dry seasonings at the very end of the roasting process. Salting veggies while they cook can cause them to release too much moisture too fast, result in a soggy mess.

But from time to time you may want to branch out into something different than just kosher salt.

Adding whole cloves of Instant Pot roasted garlic to your vegetables can create amazing flavors that have the added benefit of making you vampire-proof. Fresh sprigs of rosemary or thyme are fun and easy ways to make your roasted vegetables taste delicious. And a squirt of fresh lemon can do wondrous things to a pan full of veg

If you’re feeling a bit saucy, homemade teriyaki sauce (or a homemade gluten-free teriyaki sauce) are great ways to add some more flavor. I am a bit obsessed with putting a huge dollop of chimichurri (related: Cilantro Chimichurri) on my roasted vegetables.

Homemade pesto is also a great and fun way to jazz up your perfectly roasted veggies. Throw in some gnocchi and you’ve just created an entire meal on one sheet pan. Look at you; you’re a genius!

My go-to seasoning for roasted and grilled veggies is Montreal Steak Seasoning. We put this ish on everything! Pro tip: Costco shoppers, you can find a 29 oz container of it in the baking section.

Roasted vegetables with balsamic vinegar are also extremely popular and delicious. This recipe from Kevin is Cooking is a favorite in our house.

Inspiration For Delicious Ways to Use Roasted Frozen Vegetables


A plate of roasted asparagus on a tray with a fork and seasoning


sliced pressure cooker beets on a plate with a fork and herbs


a bowl of roasted broccoli with cheese sauce

Brussels Sprouts

A bowl of roasted brussels sprouts with garlic, a fork, and blue cloth


roasted carrots with tahini dressing on a plate

{Photo courtesy of Vikalinka}


fried gnocchi with roasted veggies in two white dishes on a grey cloth

Squash and Sweet Potato

Two bowls of oven-roasted butternut squash with chimichurri sauce on a white board

Roasting frozen vegetables has become my favorite weeknight fast dinner kitchen hack. It’s convenient, affordable, and a deliciously healthy way to get veggies into your diet.

And if you need more help or inspiration, this handy printable walks you through the basic process so that you can put your own spin on creating amazing dishes.

a printable guide for people who want to learn to roast frozen vegetables

{Click here to print this guide for roasting frozen vegetables} 




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18 comments on “Roasting Frozen Vegetables {How to Roast Frozen Vegetables}”

  1. Great post!
    I did the easy way and put all the half full bags of frozen veggies into a soup pot. Some quinoa, black beans, tomatoes and lots of spices.

  2. I should also have asked what you do to pre prep the veg!

    • The stuff I freeze myself? Almost all of it is quickly blanched and then frozen on rimmed baking sheets in a single layer that have been lined with parchment.

  3. Hey Sarah! Happy New Year!

    Do you freeze your own veg for roasting, or purchase ready frozen? I often have a surplus of veg due to my overpurchasing and inability to say no to cheap food!

    • I do a little of both Pauline! Some of my homegrown stuff ends up in the freezer or if I score an amazing deal at the farmer’s market. But for the most part I’m buying bags of frozen veggies from the store.

  4. Wow!  This is such a game changer!  I have a problem where I end up throwing produce out a lot. Sometimes it’s poor planning. Sometimes it’s just cruddy produce at the store and it doesn’t have good shelf life. I also do the 2B Mindset and it can be tough to get veggies in. 

    • It’s so nice to NOT have to prep the veg. Frozen veggies totally change the game (like you said) because it removes the excuses for me to not make a healthy side dish.

      Happy roasting!

  5. Mind blown! I can’t wait to try this.

  6. This is a great guide! Thanks ever so much for including my roasted carrot salad!

  7. I’ve been fixing our veg this way since your post on one pan gnocchi and veg. It has been such a great tip and truly makes dinner prep so much easier. Plus we eat so much more veg this way!! Thank you!!

    PS- I’m sharing this post with friends. Such a great post!!

  8. I love this post and can’t wait to try this! I’m excited about how much time this will save and super excited about not having to wash and chop veggies (one of my least favorite parts of cooking).

  9. Do you thaw before roasting or throw the veg frozen into the baking sheet? 😬