Roasting Frozen Vegetables

5 from 5 votes
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Roasting frozen vegetables is quick, simple and a delicious way to eat your veggies. Learn how easy it is to roast frozen vegetables for the perfect side dish to any meal.

Mixed vegetables in a bowl.


Frozen vegetables are a staple in our freezer. They are full of nutrients, don’t go bad, don’t require chopping, and are great to use in a variety of recipes.

I typically like cooking vegetables like broccoli and asparagus in the air fryer but sometimes it’s not available so roasting them in the oven is a wonderful option.

Why these are so good

  • No thawing! The great thing about this method is that there is no need to thaw the frozen vegetables before roasting.
  • Versatile. Use your favorite seasonings to add flavor to these delicious, healthy vegetables.
  • So easy. Zero prep time, no chopping, and all you need are a few simple ingredients to make this recipe.

What you need

Frozen vegetables – Choose your favorite mixed vegetables.

Olive oil – This helps to cook and crisp up the vegetables.

Seasoning – Keep it as simple as salt or pepper or use your favorite spice blend. This recipe uses Italian seasoning and garlic powder to add flavor.

Frozen vegetables, oil, seasonings.

How to roast frozen vegetables in oven

This is a seriously simple recipe that can be made in less than 30 minutes.

  1. Preheat: Preheat oven to 425 degrees F. Line baking sheet with parchment paper.
  2. Season: Place frozen vegetables in a bowl. Drizzle with olive oil, Italian seasoning, and garlic powder over the vegetables. Toss well to coat.
  3. Roast: Cook for approximately 30 minutes or until desired crispness.
Frozen vegetables in a bowl and on a sheet pan.

How to make frozen vegetables crispy

In order to ensure your veggies get crispy, be sure not to let them thaw before roasting. Also, cooking them on a high heat helps to get them nice and crispy. I cook mine at 425 but if you prefer super crispy you might try bumping up the heat to 450 degrees F.

One thing to keep in mind is that since frozen vegetables contain more moisture than fresh, they will get crisp but still be softer in texture than fresh roasted. vegetables.

Recipe tips

  • Be sure to spread out the vegetables in a single layer on the baking pan so that they roast well.
  • Roasting times may vary depending on what vegetables you are cooking and how large the pieces have been cut.

How to store

Store: Keep any leftovers in an airtight container in the refrigerator for 2 days.

Reheat: I like to reheat in the oven or air fryer. In the oven cook at 400 degrees F for about 5 minutes, and 360 degrees for 2 minutes in the air fryer.

Seasoning variations

There are so many ways to add flavor to these frozen vegetables. A few of our favorites include:

Roasted mixed vegetables on a sheet pan.

What to serve with roasted vegetables

These make such a quick, easy side dish or can be incorporated into a main meal.

More easy side dishes

If you tried these vegetables let me know how they turned out in the comments. Enjoy!

Mixed vegetables in a bowl.
5 from 5 votes

Roasting frozen vegetables

By Heather
How to roast frozen vegetables.
Prep: 5 minutes
Cook: 25 minutes
Total: 30 minutes
Servings: 4


  • 1 20 oz bag frozen vegetables
  • 2 tablespoons olive oil
  • 1 teaspoon Italian seasoning
  • 1/2 teaspoon garlic powder


  • Preheat oven to 425 degrees F. Line baking sheet with parchment paper.
  • Place frozen vegetables in a bowl. Pour olive oil, Italian seasonings, and garlic powder over vegetables. Toss to coat.
  • Spread vegetables out on prepared baking sheet. Bake for 25-30 minutes or until vegetables start to crisp. ***See notes.


YouTube video


Roasting times may vary depending on the vegetable. Mixed vegetables typically take 25-30 minutes while things like zucchini might less time. 


Calories: 65kcal | Carbohydrates: 1g | Protein: 1g | Fat: 7g | Saturated Fat: 1g | Sodium: 1mg | Fiber: 1g | Sugar: 1g | Vitamin A: 13IU | Calcium: 8mg | Iron: 1mg

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

Additional Info

Course: Side Dish
Cuisine: American
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