Can You Roast Frozen Vegetables?

Can frozen vegetables be roasted? This is a common question among people looking for a quick, affordable, and convenient way to incorporate vegetables into their meals or if you have a bunch of raw vegetables stored in your freezer.

Yes, frozen vegetables can be roasted. Although fresh veggies are often the go-to option for roasting, frozen veggies are a great option too. Roasting brings out their natural flavors and creates a deliciously caramelized texture.

The Benefits of Roasting Frozen Vegetables

Frozen broccoli and cauliflower in roasting pan

It Retains the Nutrients

Freezing fresh vegetables locks in their nutrients. As such, it preserves its nutritional value, making roasted frozen vegetables a healthy option and a quick go-to at the end of a long day if you don’t have the energy to stop at the store for a few fresh veggies.

It Holds the Moisture

Another advantage of roasting frozen vegetables is that they retain their moisture content during the cooking process. This results in a tender, juicy interior that perfectly complements the crispy exterior you would expect from a roasted vegetable.

Assorted fresh vegetables

Frozen Vegetables That Are Great for Roasting (And Ones That Aren’t)

While some frozen vegetables are great for roasting, others are not. Here’s a breakdown.

Frozen Vegetables That Are Great for Roasting

Some commonly available frozen vegetables include:

  • Broccoli florets
  • Cauliflower
  • Carrots
  • Brussels sprouts
  • Sweet potatoes
  • Bell pepper
  • Zucchini
  • Summer squash
  • Turnips
  • Radishes
  • Eggplant
  • Corn on the cob
  • Asparagus
  • Green beans

Frozen Vegetables That Aren’t Great for Roasting

Vegetables with high water content may not yield desirable results when roasted if they were frozen. They include:

  • Leafy greens such as kale, lettuce, and spinach
  • Cucumbers
  • Mushrooms
  • Peas
  • Tomatoes

6 Tips for Roasting Frozen Vegetables

Here are a few tips for achieving perfectly roasted frozen vegetables:

  1. Preheat the oven and roast the vegetables at high temperatures, typically between 400°F to 425°F. Roasting at high temperatures helps to achieve a crispy and caramelized exterior and ensures the moisture is sealed in.
  2. Before putting your vegetables on the baking sheet, line it with parchment paper or lightly grease it to prevent the vegetables from sticking.
  3. Coat the vegetables with oil before roasting. It promotes even browning and prevents the vegetables from drying during cooking.
  4. Season the frozen mixed vegetables before roasting to enhance their flavor. Some popular seasoning options include spices and dry herbs.
  5. Spread the vegetables in a single layer on the baking sheet to ensure even cooking. Leave space between vegetables to avoid overcrowding, which could result in steaming instead of roasting.
  6. Adjust the oven roasting time as needed. Frozen vegetables generally take slightly longer to cook than fresh vegetables. The cooking time also depends on the type and size of the frozen vegetables. Keep an eye on the vegetables during roasting and occasionally check for doneness. You may use a thermometer to check their internal temperature.

Serving and Enhancing Roasted Frozen Vegetables

Roasted vegetables on a baking tray

Roasted frozen vegetables can be served in different ways. You can combine them with grains, protein, and sauces for a complete meal or incorporate them into stir-fries or pasta recipes.

Season or top the roasted vegetables with herbs, spices, or condiments to elevate the flavor and take them to the next level. Drizzling soy sauce, teriyaki sauce, hot sauce, or lime juice adds tanginess or a savory kick to the vegetables and quickly takes them from bland once-frozen veggies to delicious.

For added texture or crunch, sprinkle breadcrumbs or crushed nuts on the roasted frozen vegetables. And, if you are a cheese lover, top them with a sprinkle of grated cheese.

Frequently Asked Questions (FAQs)

How do you roast frozen vegetables so they aren’t soggy?

To prevent the vegetables from becoming soggy, preheat the oven to a high temperature, ranging from 425-450°F. Pat them dry to remove excess moisture. Spread them out in a single layer. Don’t overcrowd the baking sheet to prevent the vegetables from steaming instead of roasting.

Is it possible to make frozen vegetables crispy?

Yes, it is possible. To make frozen vegetables crispy:

  • Cook them on high heat.
  • Apply a thin coat of oil. It promotes browning and makes the exterior crispy.
  • Broil the vegetables for a few minutes after roasting to add crispiness.

Do you have to thaw frozen vegetables before cooking?

For best results, don’t thaw your veggies before roasting them. Thawing can cause the vegetables to become soggy or give them an undesirable softer texture.

However, note that frozen vegetables take longer to cook than if they were partially or completely thawed. But it is still an easy and affordable solution if you don’t have time to buy and prepare fresh veggies.


Roasting frozen vegetables is indeed possible and can yield delicious results. However, roasting isn’t suitable for all types of frozen veggies. Remember, it’s not recommended for leafy greens and high-water content vegetables like cucumbers and tomatoes.

You also don’t need to thaw the vegetables before tossing them into the oven to roast. However, preheat and roast the vegetables at high heat for a soft interior and crisp exterior.

Season them for enhanced flavor. You can incorporate roasted frozen vegetables into different recipes or serve them with your favorite dips or sauces.

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