Roasted Frozen Brussels Sprouts

Wondering how to cook frozen sprouts? This easy roasted frozen brussels sprouts recipe turns them into a healthy budget-friendly side dish for the whole family. Plus, you only cook what you need so there's less waste.

Have you ever wondered how to cook frozen brussels sprouts? You could steam or boil them, but I find the best way is to stick them in the oven!

Roasted frozen brussels sprouts are super easy, convenient and tasty.

Using frozen vegetables is the best way to get healthy side dishes on the dinner table without breaking the bank.

Brussels sprouts are incredibly versatile and nutrient-dense and can also be found frozen in any grocery store.

Using this method, you can roast them in the oven straight from frozen!

Why You'll Love This Recipe

Brussels sprouts are a healthy vegetable that contain a high amount of nutrients.

You can flavor them or toss them in many different seasonings and dressings, from balsamic glaze to parmesan cheese.

Frozen brussels sprouts are very budget-friendly.

They help save time making dinner by not having to chop, thaw or steam them.

You can make as many as you want all at once to scale for your family size without any food waste.

Roasting brussels sprouts from frozen produces a nice tender brussel sprout that is tender on the inside and slightly browned on the outside without it being crispy.

Ingredients & Tools 

Frozen Brussels Sprouts: You can use any amount you need as long as they fit on a sheet pan. If you're cooking lots, then use two sheets so they're not crowded (or they'll steam instead of roast)

Oil: This will help the sprouts roast up nicely.

Salt: Salt will not only bring out the flavor of the brussels sprouts but it will also help draw out some of the moisture so it roasts properly.

For Serving:

Grated Cheese: This is optional but it elevates the final dish. Feel free to use any hard cheese you like, such as parmesan, or even vegan parmesan cheese. 

How to roast frozen sprouts

Follow this step-by-step photo tutorial, then scroll down to the recipe card for the full ingredients list and method.

Preheat the oven to 430F / 220C and line a rimmed baking sheet with parchment paper.

Put the frozen brussels sprouts onto the baking sheet (no need to thaw them first!), drizzle with the oil and sprinkle with a little salt.

Roast in the oven for 25 minutes or until soft inside and lightly browned on the outside.

If desired, sprinkle with a little parmesan and more sea salt.

Tips 

It’s important to know that the brussels sprouts will not be crispy when they are finished as if you roast raw un-frozen sprouts. They will be slightly brown on the outside and deliciously tender all the way through.

Once they are fully cooked, test for desired flavor and toss with more oil or salt if needed as the roasting process may have absorbed a lot of the flavor.

Most frozen brussels sprouts come in their whole form. It’s ok to roast them whole with no need to cut them. 

Do not overcrowd the baking sheet as that will cause them to steam and become mushy when roasting brussels sprouts from frozen. Make sure they are in a single layer on the baking sheet.

Serving Suggestions

Toss them with Vegan Chicken Broth Seasoning. 

Pairs well with Maple Glazed Carrots & Cayenne. 

Serve with a side of Sriracha Aioli for dipping. 

Add them to this easy Vegan Quiche. 

Bring to a holiday party with this Vegan Stuffing with Sage. 

Variations

Toss with lemon juice after baking for a fresh acidic flavor.

Add in some fresh herbs after roasting.

Roast with a pinch of cayenne pepper for spicy brussels sprouts.

Sprinkle with your favorite chopped nuts after roasting for a crunchy texture.

Add a drop of liquid smoke to the final dish for smoky brussels sprouts.

Drizzle the cooked sprouts with a little balsamic glaze.

Add chopped vacuum-packed whole cooked chestnuts for a traditional British twist.

Special diets

To Make Gluten Free: Brussels sprouts are naturally gluten free but be sure to check your labels on individual spices or toppings as they may contain wheat ingredients.

To Make It Vegan: This recipe is naturally vegan and vegetarian friendly. Be sure that your desired toppings (such as cheese) are vegan or vegetarian friendly.

NOTE: I am not a certified nutritionist and make no claims to the contrary. If you have a food allergy or intolerance you should determine whether the ingredients in each recipe are suitable for you.

Storage 

Storing: You can store cooked brussels sprouts  in an airtight container for up to 3 days but is best consumed immediately after roasting.

Freezing: It is not recommended to freeze these brussels sprouts because they have already been frozen. Refreezing them again will result in a mushy texture that is not palatable.

FAQs 

Can I make these in the air fryer? Yes! You can make them in your favorite air fryer by roasting at 375F for 20 minutes. All air fryers are different so be sure to check them frequently to prevent overcooking.

How do I make frozen brussels sprouts not mushy? The trick to making them hold up is to not thaw them at all. Thawing them will change the structure. When they are cooked at high heat such as in this recipe, they hold up much better.

How can I tell if frozen brussels sprouts have gone bad?  If they are freezer burned, have black or moldy spots or if they don’t smell right they have probably spoiled. Throw them away and grab another bag at your local grocery store.

Can I freeze fresh brussels sprouts? Yes! If you  have an abundance of fresh brussels sprouts you can freeze them yourself by trimming the stem, removing any brown leaves and placing them on a rimmed baking sheet in a single layer overnight. This will create a layer of ice so that they will not stick together. Once they are completely frozen you can transfer them to a freezer safe bag to freeze for up to 4-6 months.

You’ll Also Love These Easy Side Dishes

Roasted Garlic Mashed Potatoes

Maple Roasted Butternut Squash

Mac and Cheese Balls

Parmentier Potatoes

Braised Red Cabbage

📖 Recipe