How to Roast Frozen Vegetables

Gluten FreeVeganWhole30

Did you know that you can roast frozen vegetables? It’s true! They come out perfectly browned, caramelized, and absolutely delicious. Next time you need an easy side dish idea, look no further than your freezer!

An overhead view of frozen mixed vegetables (carrots, cauliflower, and broccoli) on a sheet pan.

I used to be the kind of person who would go to the grocery store 3 times a week to grab whatever I felt like making for dinner that night. I never really had to plan ahead, could make whatever it was that I was craving, and didn’t have to worry about my ingredients being fresh.

Like so many things, that completely changed over the last year.

Now, I get groceries delivered once a week or so which means planning ahead is crucial. And no matter how well I plan, my produce starts to look pretty sad by the end of the week.

One night not too long ago I was staring at the fridge wondering what on earth I was going to make for dinner. My eyes landed on a bag of frozen mixed vegetables that had been in the freezer for who knows how long.

I thought to myself… can you roast frozen vegetables?

It turns out you can! Roast frozen vegetables are super easy to make and very convenient.

You don’t have to worry about fresh produce going bad and since most vegetables are frozen at peak ripeness they can be better than what’s languishing in your refrigerator drawers.

A bag of pics frozen California blend vegetables.

I know, frozen vegetables might bring back some not-so-great memories.

I promise you these aren’t the waterlogged, bland boiled frozen vegetables that we grew up with. Roast frozen vegetables are surprisingly tasty!

They’re still softer than fresh vegetables are, but their flavor gets concentrated and they caramelize and brown better than I would have guessed.

Pro Tip: Like anything, different quality products will give you different results.

I loved the way Whole Foods 365 organic root vegetables roasted and could happily eat them every day.

I also had great luck with locally grown frozen broccoli that’s available at our neighborhood co-op.

The store-brand mixed vegetables shown here were tasty, but did come out much softer and with less flavor than the more premium products did. They also had a thicker layer of ice on them straight from the bag, which resulted in them steaming a little more than roasting. They didn’t get quite as browned or crispy as the other vegetables did.

Mixing frozen vegetables and oil in a large bowl.

How to roast frozen vegetables in 3 easy steps

Step 1: Lightly coat the frozen vegetables with oil

Like I explained in my roast carrots recipe, coating the vegetables with oil helps increate their surface temperature and insulated them so they don’t dry out in the hot oven.

You can do this by tossing them with oil in a mixing bowl, or use an oil spray to lightly mist them.

You do no need to defrost the vegetables first.

Step 2: Spread them in a single layer on a preheated baking sheet

Stick your baking sheet in the oven while it preheats to help speed up the cooking process and get those veggies nice and hot!

Be sure the spread the vegetables in a single layer so they have plenty of space around them. If you crowd them together, they’ll steam and won’t get those terrific browned bits that make roasted vegetables so good.

Step 3: Flip them after 15 minutes

After about 15 minutes, the vegetables should start to brown. Flip them over so both sides can get nice and caramelized.

overhead view of frozen vegetables on a sheet pan

Seasoning ideas for frozen vegetables

When it comes to seasoning roast vegetables, there are so many options!


You can also add flavor these roast frozen veggies after they come out of the oven by:

  • Tossing them in your favorite vinaigrette
  • Drizzling them with a balsamic reduction
  • Mixing them with lemon zest and fresh parsley
  • Using them as a base for another recipe, like this roast cauliflower with pomegranate seeds

Serving suggestions

These roast vegetables are perfect as a side dish when you need something in a pinch. I love serving them on the side of roast chicken thighs.

But you can also get creative!

Try piling roasted root vegetables on top of baby spinach and pouring on some citrus vinaigrette to make a hearty winter salad.

You can also add them to broth to make an easy but flavorful soup. I love adding leftover roast butternut squash to store-bought coconut-lime broth for an easy lunch.

More vegetable side dish ideas

A white bowl filled with roast frozen vegetables
How to Roast Frozen Vegetables

How to Roast Frozen Vegetables

Yield: 4 servings
Prep Time: 5 minutes
Cook Time: 30 minutes
Total Time: 35 minutes


  • 1 bag frozen vegetables
  • 1 Tablespoon oil oil
  • Salt and Pepper


  1. Preheat your oven to 450°F. Place a baking sheet in the oven while it heats up.
  2. In a mixing bowl, toss the frozen vegetables with the oil. Sprinkle with salt, pepper, and any other seasonings you want to use.
  3. Spread the vegetables in a single layer on the hot baking sheet. Roast for 15 minutes, then give them a good stir. Return them to the oven and bake for another 10-15 minutes, or until the edges are golden brown and crisp. (Note larger cuts and sturdier vegetables will take longer to roast than more delicate vegetables. Some, like green beans, may be done after the first 15 minutes.)
Nutrition Information
Yield 4 Serving Size 1
Amount Per Serving Calories 77Total Fat 7gSaturated Fat 0gTrans Fat 0gUnsaturated Fat 6gCholesterol 0mgSodium 82mgCarbohydrates 3gFiber 1gSugar 1gProtein 1g

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By on February 18th, 2021

About Lauren

Hi, I'm Lauren! I'm a certified plant-based cook and enthusiastic omnivore who loves looking for creative ways to make weeknight meals more nutritious. I'm the author of Heathy Eating One Pot Cookbook and Healthy Meal Prep Slow Cooker Cookbook.

More posts by this author.

2 thoughts on “How to Roast Frozen Vegetables”

  1. Hi Lauren,

    You are just what I like and need ,fast easy to prepare and healthy dishes,Delighted to get one pot,slow cooker ideas as bought a pot that hs numerous functions,




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