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This is the ultimate guide to Roasting Frozen Vegetables. 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. 

4 photos of roasted frozen vegetables
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The day I realized that not only could you roast frozen veggies, but that they were absolutely delicious, well my life changed.

Using frozen veggies 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 sheet pan, pick some seasoning, and get ready to save a boatload of time and money.

What is the trick to roasting frozen vegetables?

There are four tricks to making frozen vegetables taste delicious:

  1. Do not thaw the frozen vegetables before roasting.
  2. 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.
  3. Preheat the pan. Place the sheet pan in the oven while the oven is preheating. A hot pan will give the frozen vegetables a jump start on the roasting process.
  4. 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.

What Type of Pan is Best For Roasting vegetables?

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

I don’t recommend using parchment or foil on your baking sheets when roasting. I believe it prevents a great sear from happening and gives the veg too much opportunity to steam instead of roast. Of course, you can use them if you’d like, but you may need to add a few minutes of cooking time.

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 with soap 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 veggies, then using a cast iron skillet is the way to go.

roasted broccoli on a sheet pan.

Frequently Asked Questions

Can you roast Frozen Vegetables?

Yes! And when it comes to cost, you cannot deny the incredible savings you get from using frozen vegetables. 

Frozen vegetables are much more affordable than their fresh counterparts. And someone else has already done the prep for you. Win, win!

Are roasted frozen vegetables good?

They sure are! They’re ready in a flash and are easy to customize to your taste and preferences.

The texture of roasted frozen vegetables will be slightly softer than fresh vegetables, but they will still be delicious.

Do You need to thaw frozen vegetables before roasting?

No, please don’t! Frozen vegetables will cook/roast better if you put them in a very hot oven while they’re still frozen.

How do you make frozen vegetables crispy in the oven?

The best way to get crispy frozen vegetables is to fully preheat the oven and sheet pan, cook at a very high temp, and to not crowd the pan.

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.

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, resulting 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 squeeze of fresh lemon can do wondrous things to a pan full of vegetables.

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

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

More Vegetable REcipes You’ll Love

5 from 3 ratings

How to Roast Frozen Vegetables

Prep: 2 minutes
Cook: 19 minutes
Total: 21 minutes
This is the ultimate guide to roasting frozen vegetables. 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. 


  • 1 lb frozen vegetables {do not thaw}
  • 2 tsp olive oil {or avocado or coconut oil}
  • pinch sea salt


  • Preheat oven to 435˚F. Place a sheet pan in the oven while the oven preheats.
  • In a medium mixing bowl, toss the vegetables with the olive oil.
    2 tsp olive oil, 1 lb frozen vegetables
  • Place the vegetables on the pan and roast, depending on the vegetable and your texture preference, stirring halfway through. Do not crowd the pan or thaw the vegetables.
  • Suggested Roasting Times
    *Asparagus ~17 minutes
    *Beets (sliced) ~20 minutes
    *Broccoli ~20-26 minutes
    *Brussel Sprouts ~20-26 minutes
    *Carrots ~16 minutes
    *Cauliflower ~17-25 minutes
    *Squash ~22 minutes
  • Top with a pinch of salt.
    pinch sea salt


  1. Do not thaw the frozen vegetables prior to roasting.
  2. Don’t crowd the pan! Give the vegetables plenty of space to roast. Too much veg all smushed together will cause the water to steam instead of evaporating. Try using two or even three pans if you want to roast larger batches.
  3. You can reheat your roasted frozen vegetables, but I find they’re best eaten within 1-2 days of roasting.
  4. This base recipe gives you so much freedom to add your favorite seasonings and flavors. I love mixing in garlic powder, Everything But the Bagel Seasoning, Montreal Steak Seasoning, and grated Parmesan.


Serving: 0.25cupCalories: 58kcalCarbohydrates: 8gProtein: 3gFat: 3gSaturated Fat: 1gSodium: 37mgPotassium: 358mgFiber: 3gSugar: 2gVitamin A: 706IUVitamin C: 101mgCalcium: 53mgIron: 1mg

Nutrition information is automatically calculated, so should only be used as an approximation.

Additional Info

Course: Side Dish
Cuisine: American
Tried this recipe?Mention @sustainablecooks or tag #sustainablecooks!

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Helping you serve up budget-friendly sustainable recipes with a side of balanced living.
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    1. You can, but they won’t be as flavorful. You’ll want to make sure you have some surface down between the veggies and pan to prevent sticking if you don’t use oil. Something like parchment would work.

      1. Thanks. I’ll give it a try with Parchment paper and then add some extra spices on it for flavour (at the end of the cooking). I will let you know how it turns out.

  1. This is awesome! Any tips on roasting corn or other veggies? What about artichokes? I’m big on meal prep, and this is exactly what I need.

    1. Jean, this is a round up of all different kinds of veggies. There is not one set temp. You’ll find cooking times in the chart for different veggies.

      1. Thank you for the reply! I am having fun exploring all the great ideas you have here! So glad I happened upon this.

    1. Yay, that makes me soooo happy Paula, seriously! I think it was my first “infographic” that I made. It’s a little clunky and seriously took me two hours. But knowing that people actually use it, thrills me to no end.

  2. I roasted frozen butternut squash last night…total game changer! It was fast, easy and delicious. Squash is a minimum of 1.99 a lb here, so I rarely buy it, particularly as I’m the only one in my family who eats it. Now that I know I easily can roast a portion for myself without waste, frozen butternut squash will live in my freezer year round. Thanks!5 stars

  3. Your article is great any suggestions on roasting Frozen new potatoes or potatoes. Or stew vegatable pack

    1. Hi Dennis, I would definitely try potatoes but I’ve never once found them frozen in my area. I’d roast at 450 degrees, checking after 15 minutes and then reducing the temp to 425 until done.

      “Stew vegetable pack” is not something I’m familiar with. Can you tell me more about this?