Once you know how to cook frozen green beans in the oven, you’ll never look back. This simple recipe is a tasty way to turn frozen green beans into a delicious side dish.

A side of roasted frozen green beans on a plate with meatballs and mashed potatoes.

Try these simple Roasted Frozen Green Beans on a busy weeknight!

You know those busy weeknights where all you want to do is order delivery, but you know there are ingredients in your fridge and pantry that would make a great dinner? 

Even as a food blogger, I have those nights sometimes. My goal is to give you simple recipes for easy meals you can make for dinner because I can relate!

Instead of buying fresh green beans that you have to trim, wash, cut, and all of those extra steps, you can take frozen green beans straight from the freezer and turn them into a simple side dish that’s full of flavor.

Green beans go well with so many dishes and cuisines, like French Onion Meatballs or Honey Garlic Chicken. They’re an easy side dish for weeknight dinners.

String beans vs. Green beans

Green beans and string beans are actually the same things! So if you see frozen string beans, you are safe to buy that kind. 

The name string bean is actually somewhat outdated. It refers to the thin, fibrous “string” that used to run down the length of the pod and that had to be removed by hand, bean by bean, like snap peas. Also known as snap beans.

But in the 19th century, these strings were eliminated thanks to careful breeding, according to Serious Eats. These days, only heirloom varieties contain strings. 

You may also see thin green beans (also called haricots verts) which are a French style of green beans. These work great as well!

Why you’ll love this Frozen Green Bean Recipe

This green beans recipe is so good. Here’s why you’ll come back to it again and again: 

  • Roasted frozen green beans are quick and easy. Rip open the bag, season, bake and voila! 
  • Kids love green beans. Sometimes we serve them with dipping sauce for “green fries.” 
  • Frozen veggies are budget-friendly. They’re a great way to save money.
  • Frozen green beans won’t go bad as quickly as fresh ones, so you’ve always got a great veggie dish ready to go in the freezer. 

I’ll show you the easy way to cook frozen green beans for the best taste. You’ll never go back to steaming or microwaving! 

Frozen Green Beans Recipe Ingredients

Frozen green beans seem like they’d be enough on their own, but they’re actually even better with some light seasonings. Here’s what you’ll need to grab from your pantry to make these

  • frozen green beansYou can use any frozen green bean for this, including the steamable kind. However the steamable bags come in special packaging and may cost more, so keep an eye out. 
  • avocado oil – You can use sesame oil, olive oil, or vegetable oil instead. I like avocado oil because it has a neutral taste. You can even melt butter in place of the oil. Just use the melted butter the same way as the oil.  
  • coarse kosher salt – You can use coarse sea salt instead. Stay away from table salt though — it is much better for seasoning a finished dish than for cooking. 
  • ground black pepper – I like to use this pepper grinder for cooking. Fresh pepper makes a huge difference in flavor. 
  • garlic powder & onion powder – make sure they aren’t expired for the best taste. Most spices need to be replaced after 6 months.

If you prefer, you can use a seasoning salt like Lawry’s or Krazy Jane’s instead of the salt, pepper, garlic, and onion powders. Italian seasoning will give it great flavor as well.

frozen green beans and seasonings.

How to cook Frozen Green Beans in Oven

(The full printable recipe card with measurements and full details are at the bottom of this post)

Here’s how to cook these frozen green beans in the oven. 

  1. First, preheat the oven to 425ºF. Line a baking sheet with parchment paper. You can also use a silicone baking mat.
  2. Add the green beans to a mixing bowl. Add the oil, salt, pepper, garlic powder, and onion powder. Stir well until it’s well combined and the beans are well-coated. 
  3. Then spread out the green beans on the baking sheet in a single layer. Place in the oven and bake for 30 minutes. 
  4. Remove from the oven and enjoy straight away. 

Frozen Green Bean Recipe tips and tricks

Green beans deserve salt, pepper, and seasonings to help bring out their bright flavor. Don’t under season them. The seasoning for frozen green beans in this recipe is simple and easy to make with items you probably already have on your spice rack. 

Green beans can easily be undercooked. You want them to have time to roast out the extra water that is captured when they are frozen. 

If you want to check for doneness, use a pair of tongs to fish out a green bean from the pan. Let it cool slightly, then take a bite. It should be mostly soft with a slight crispiness. If it is crunchy, it needs more time. 

Should I thaw Frozen Green Beans before cooking?

Thawing frozen green beans seem like it would make sense, but it’s actually better to cook them from frozen. Cooking thawed beans can result in mushy green beans, which is no good! 

How to make this tasty side dish work for the whole family

If you have a picky eater, the seasoning and texture will be the biggest factors. Using seasoning you know they like is a great option.

In regards to texture, instead of leaving them tender-crisp texture, continue to roast them until they are softened.

Storing leftover Roasted Frozen Green Beans

Allow the green beans to cool completely. Place them in an airtight container in the fridge for up to 5 days. 

What to serve with this Roasted Frozen Green Beans Recipe

Green beans make a wonderful side dish for so many recipes. 

One of my favorites is as a green veggie to go with any kind of meat and potatoes. Whether it’s steak and baked potatoes, crispy fried pork chops, or lemon chicken and mashed potatoes

Try them with an Asian dish like orange chicken or beef teriyaki

Green beans also work well with fish dishes. This baked lemon butter salmon can be cooked in foil in the oven alongside your veggies. 

Baking sheet with roasted frozen green beans.

Reheating Frozen Green Beans in Oven

Once you have made this recipe, they are best reheated on the stovetop. I recommend using a large skillet

You may use a drop of oil if your pan is dry, but the beans should have retained the seasoning and should be moist enough on their own.  

Cook the beans over medium heat, pushing the beans around with a silicone spatula, until heated through, about 5 minutes.

An alternative method would be to use your air fryer. Place the beans in the air fryer basket and heat at 350°F until heated through.

Toppings to add to Roasted Frozen Green Beans

While frozen roasted green beans are a perfect side dish on their own, next time try adding some toppings. Some great ones include:

  • almond slivers
  • balsamic vinegar
  • pat of butter
  • fresh parsley
  • feta cheese
  • red pepper flakes
  • parmesan cheese
  • lemon juice

Frozen Green Beans FAQs

Can you roast frozen green beans in the oven?

Yes! Frozen green beans are great roasted. Simply season them with oil, salt, pepper, and seasonings and place them on a baking sheet. Bake for 30 minutes at 350°F. 

Can you use fresh green beans?

Sure! This recipe works well with fresh beans too! But since they’re not frozen, you will need to cut back on the cooking time a little bit. They will take around 20 minutes at 350°F.

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Roasted Frozen Green Beans

By: sweetlysplendid.com
5 from 45 votes
Cook 30 minutes
Total 30 minutes
Servings: 4
Once you know how to cook frozen green beans in the oven, you’ll never look back. This simple recipe is a tasty way to turn frozen green beans into a delicious side dish.



  • Preheat oven to 425°F.
  • In a mixing bowl, combine all of the ingredients and mix until it’s well combined.
  • Spread the green beans on the baking sheet in a single layer.
  • Place in the oven and bake for 30 minutes.
  • Remove them from the oven and enjoy.



  • Don’t undercook them, you want them to have time to roast out the extra water
  • Don’t underseason them
  • Don’t thaw them before cooking – can result in mushy green beans


Serving: 1serving, Calories: 101kcal, Carbohydrates: 9g, Protein: 2g, Fat: 7g, Saturated Fat: 1g, Polyunsaturated Fat: 1g, Monounsaturated Fat: 5g, Sodium: 589mg, Potassium: 254mg, Fiber: 3g, Sugar: 4g, Vitamin A: 784IU, Vitamin C: 14mg, Calcium: 45mg, Iron: 1mg

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

Additional Info

Course: Side Dish
Cuisine: American

Hi! I’m Kara!

Kara loves all things food and spending time with her family and dogs. She has a passion for cooking and loves making yummy, family-friendly recipes.

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