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Roasted Frozen Cauliflower

Frozen vegetables are one of the easiest dinner time sides. This roasted frozen cauliflower is easy to make and tastes amazing! All you need is a bag of frozen cauliflower, olive oil, and a few spices to make this simple dish your family will love. 

roasted frozen cauliflower on a baking sheet with a red spatula

This easy roasted frozen cauliflower is the answer to trying a new vegetable side dish this week!

Frozen roasted vegetables are my go to side these days. 

I already have recipes for roasted frozen carrots , roasted frozen brussel sprouts, and frozen broccoli, so of course cauliflower needed to be next on my list to make! 

Especially with times like we find ourselves in currently, frozen vegetables are an absolute must have. 

My freezer is stocked full of bags of all kinds and it has made dinner time quicker.

The convenience factor cannot be beat. 

When you need a fast and healthy side dish, frozen vegetables are the answer!

roasted cauliflower on a brown baking sheet

how to make roasted frozen cauliflower

You will need one bag of frozen cauliflower. 

If you are feeding more than 2-3, just double this recipe!

One thing I notice is that we always regret not making more.

This roasted cauliflower is so delicious I could have eaten the whole batch myself!

Preheat your oven to 450 degrees. 

Place the cauliflower on a nonstick sheet pan. 

frozen cauliflower on a baking sheet with spices sprinkled on it before cooking

Do not allow the cauliflower to thaw before cooking.

Roasting from frozen allows us to get the perfect texture and those delicious crispy edges. 

It’s very important to place the cauliflower straight from the freezer to the tray, with the oven already preheated.

Use olive oil cooking spray to generously coat the top of the cauliflower. 

I always suggest cooking spray when preparing frozen vegetables, as it is much easier to make sure everything is well coated. 

roasted cauliflower on a baking sheet up close

Once the cauliflower is sprayed, sprinkle on even amounts of salt, pepper, garlic powder, and onion powder. 

No need to stir, just sprinkle so that it is all evenly covered. 

Place the cauliflower in the preheated oven and cook for 15 minutes without touching it. 

This will help the cauliflower edges crisp up!

After 15 minutes, remove the pan from the oven and stir/flip the cauliflower. 

Spray the cauliflower again with a light layer of olive oil cooking spray, then sprinkle powdered parmesan cheese over the tops of the florets. 

Roast for an additional 5-10 minutes, until the cauliflower is browned with crispy parmesan edges!

roasted frozen cauliflower on a brown baking sheet

The recipe is simple, but it’s all in the method! 

This cauliflower was the favorite food on my plate. 

Roasting cauliflower without any fuss and no chopping required is perfect for busy nights (or for when you are cooking dinner for what feels like the 100th night in a row). 

Try making this for dinner and let me know what you think!

a red spatula picking up a scoop of roasted cauliflower

Are you making this recipe? I want to see! Don’t forget to tag me on instagram @buildyourbite and hashtag #buildyourbite with your recipe creations!

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frozen cauliflower recipe graphic with two images from the recipe

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Roasted Frozen Cauliflower Recipe

Yield: 2-3 servings

Roasted Frozen Cauliflower

roasted frozen cauliflower on a red spatula

Easy roasted frozen cauliflower recipe with crispy parmesan edges. You can't go wrong with this simple side dish!

Prep Time 5 minutes
Cook Time 25 minutes
Total Time 30 minutes


  • 12 oz bag of frozen cauliflower
  • olive oil spray
  • salt
  • pepper
  • garlic powder
  • onion powder
  • powdered parmesan cheese


  1. Preheat your oven to 450 degrees
  2. Place the frozen cauliflower florets on a nonstick baking sheet and spray generously with olive oil spray to coat
  3. Sprinkle on even amounts of salt, pepper, garlic powder, and onion powder until evenly coated
  4. Roast at 450 degrees for 15 minutes without flipping
  5. Remove from the oven after 15 minutes, and stir/flip the cauliflower
  6. Spray again with olive oil spray, then sprinkle on powdered parmesan cheese over the tops of the cauliflower florets
  7. Roast an additional 5 - 10 minutes, until florets are browned with crispy edges
  8. Serve and enjoy!

Nutrition Information:



Serving Size:


Amount Per Serving: Calories: 81Total Fat: 6gSaturated Fat: 1gTrans Fat: 0gUnsaturated Fat: 4gCholesterol: 1mgSodium: 242mgCarbohydrates: 7gFiber: 3gSugar: 2gProtein: 3g

Did you make this recipe?

Be sure to tag me on instagram @buildyourbite and hashtag #buildyourbite with your recipe creations!

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Marcy Steindler

Thursday 10th of September 2020

Very tasty - I didn't have olive oil spray so I put a little olive oil on the bottom of the pan and used regular spray over the top. I just used salt and garlic powder, with the hit of parm. Really enjoyed it and happy that it didn't get mushy.

Joy Shull

Friday 11th of September 2020

glad you enjoyed the recipe Marcy!


Thursday 10th of September 2020

I was skeptical of this working, but it turned out great! I just used olive oil, salt and pepper and didn't even flip because I forgot. We've been burned by so many supposed 4-5 star blog recipes lately that just turn out to be blah. I'm happy to say this is a winner. Thank you for introducing us to a new way of making easy veggie side dishes!

Joy Shull

Friday 11th of September 2020

I'm so happy you enjoyed the recipe!


Saturday 20th of June 2020

Soooo good! I love the convenience of using frozen, I tend to buy whole ones and forget to use them.... I used shredded Parm and it made great crispy chips... thank you!