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Topped with punchy garlic, fresh lemon, and melty parmesan, these oven-roasted green beans are BURSTING with flavour! They’re incredibly easy to make and only 6 ingredients – this simple vegetable side dish is ready in 30 minutes.

Roasted green beans served in a bowl.

These garlic and parmesan roasted green beans are going to be your new favourite side dish! My husband and I absolutely DEVOURED them and almost ate the whole dish in one sitting LOL.

This recipe is perfect all year long – you can enjoy this recipe in the summer when green beans are in season, but they also make a wonderful holiday side dish. They’re a really easy option to make, which is always nice if you’re making a big dinner spread! If you need inspiration, I’ve included a bunch of serving ideas for you in this post.

As a dietitian, I’m also so happy to share that green beans are packed with so many nutrition benefits. I’ve highlighted all their nutritious goodness below, if interested. I hope you enjoy this recipe 🙂

Want more ways to cook green beans? You may also love these sautéed green beans with dijon dressing, or this green bean potato salad with maple dijon vinaigrette. Both would also make lovely side dish options!

Parmesan roasted green beans on a sheet pan.


What temperature do you roast green beans? For how long?

I roasted these green beans in a 400F (205C) oven for 25 minutes. Depending on your oven and desire doneness (I love them a little browned!!), you may find that you can roast green beans anywhere between 15-25 minutes.

To check if they’re done, the green beans should be fork-tender with a slight bit of resistance. You’ll want them tender, but with a bit of crunch (not mushy).

Do you need to trim green beans?

Yes. Before roasting your green beans, you will want to trim the stem end. The fastest way to do this is to line a handful of the green beans up against a knife. Then, cut across the stem end to trim a bunch at the same time.

If you want to skip this step, you can look for pre-trimmed green beans in the packaged produce section.

Do you need to blanch green beans before roasting?

Blanching isn’t necessary before roasting – skip this step!

Can you roast frozen green beans?

This recipe as written is for FRESH green beans, but it is possible to roast frozen ones. I have not tried this personally, so you may need to experiment a little. Here are some tips I’ve gathered for roasting frozen green beans:

  1. Use directly from frozen, don’t thaw the green beans first. This means straight from the freezer to the pan!
  2. Get rid of as much ice as you can, to promote even cooking.
  3. Be sure to space green beans out so they don’t steam each other. You’ll want to use a large baking sheet instead of baking dish here.
  4. Ensure that you are using very high heat so that the water evaporates quickly – most frozen green bean recipes call for heat between 425-450F. In this case, I would add the parmesan halfway through to prevent burning, or stir it in at the end.
Recipe ingredients in small bowls.

About the ingredients + possible substitutions

  1. Green beans: These long, brightly coloured beans are also known as French beans, string beans, or snap beans. You can find them either loose in the produce section at your grocery store, at the farmer’s market (from roughly May-October), or packaged options that are pre-trimmed. When purchasing, make sure that your beans are looking fresh – avoid ones with too many brown or mushy spots. This recipe calls for one pound of green beans, but it’s ok if you’re a bit over and/or under on the weight!
  2. Olive oil: While olive oil tastes bests with green beans, you may swap for another nutritious, neutral-flavoured oil like avocado oil, if desired.
  3. Garlic: I used freshly minced garlic which adds a nice texture when it gets roasted in the oven. You are welcome to use garlic powder, if you are in a pinch.
  4. Parmesan: I recommend using freshly grated parmigiano-reggiano for the best flavour and quality. If you’re vegan/dairy-free, you are welcome to swap with a dairy-free alternative OR use nutritional yeast. If using nutritional yeast, I’d use about half of what the recipe calls for parmesan. Otherwise, feel free to leave out the cheese entirely – this recipe will still be yummy!
  5. Lemon: Fresh lemon juice adds a lovely brightness and acidity to the green beans. If you like things extra lemony, you could also finish with a sprinkle of lemon zest.
  6. Parsley: Freshly chopped parsley pairs wonderfully with green beans. Use as a garnish before serving.

Full ingredient measurements and detailed instructions are located in the printable recipe card at the bottom of this post!

Visual guide: how to roast green beans in the oven

Stems trimmed off of green beans.

STEP 1: Trim the stem end off of your green beans by lining a handful up against a knife. Then, cut across the stem end to trim a bunch at the same time. If you’re using pre-trimmed beans, you can skip this step.

Green beans on pan tossed in olive oil and garlic.

STEP 2: Transfer the green beans to a line baked sheet. Toss them in olive oil, minced garlic, salt, and pepper. Then, arrange the green beans in a single layer.

Green beans on pan topped with grated parmesan.

STEP 3: Top the green beans with freshly grated parmigiano-reggiano, coating them evenly.

Parmesan roasted green beans on a sheet pan.

STEP 4: Place green beans in the oven for about 20 minutes, or until they’re lightly browned, slightly tender, and the cheese is melted and crisp. Finish with a squeeze of lemon juice and fresh parsley!

What to serve with these roasted green beans

Green beans are a fiber-rich veggie. To round out your meal, I recommend serving this recipe with a protein and starch. These roasted green beans can be enjoyed all year long, but they do make a great option for a holiday spread!

For a starch pairing, why not try:

For a protein:

TIP: since you already have the oven on, you may want to make your proteins and/or potatoes (if using) in the oven at the same time 😉

Nutrition benefits of green beans

Green beans are incredibly nutritious. To start, they’re a great source of different vitamins including:

  • vitamin C
  • vitamin A
  • vitamin K
  • vitamin B6
  • vitamin E
  • B-vitamins

They’re also a source of essential minerals, like:

  • calcium
  • iron
  • manganese
  • phosphorus
  • potassium
  • zinc

Green beans are also a good source of dietary fiber, with 1 cup of green beans providing almost 4 grams (13% of your daily needs). Fiber plays a role in heart health, blood sugar control, and digestive function!

Parmesan roasted green beans served in a bowl.

More easy, roasted vegetable side dishes

Did you give this Roasted Green Beans Recipe a try? Let me know by leaving a comment and recipe rating below!

If you do make this recipe, don’t forget to tag me on Instagram or Pinterest – seeing your creations always makes my day. You can also subscribe to my email list to never miss a new recipe or nutrition education post!

Get the Recipe: Oven-Roasted Green Beans (30-Minute Side Dish)

Topped with punchy garlic, fresh lemon, and melty parmesan, these oven-roasted green beans are BURSTING with flavour! They're incredibly easy to make, only 6 ingredients, and ready in about 30 minutes.
Roasted green beans served in a bowl.
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5 from 6 votes
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  • 1 pound green beans, trimmed
  • 2 Tbsp olive oil
  • 2 large cloves garlic, minced
  • Salt + pepper, to taste
  • 1/2 cup parmesan, freshly grated (I recommend parmigiano-reggiano)
  • 1/2 a lemon, juice
  • 1-2 Tbsp fresh parsley, chopped (to garnish)


  • Preheat oven to 400F. Line a large baking sheet with parchment.
  • Place green beans on baking sheet. Toss in olive oil, minced garlic, salt, and pepper. Spread in an even layer after tossing.
  • Sprinkle grated parmesan over green beans, covering evenly.
  • Transfer green beans to the oven for about 20 minutes, or until they are lightly browned and the cheese is melted and slightly crispy. The beans should be fork-tender, but still have a crunch to them!
  • Remove green beans from oven and top with freshly squeezed lemon juice and parsley. Season with extra salt and pepper, as needed. Serve hot!


*LEFTOVERS: Any leftovers can be kept in an airtight container in the fridge for up to 3 days. You can easily reheat them with a quick zap in the microwave (approx. 40 seconds) or in the oven.
*VEGAN OPTION: If you’d like a vegan version of this recipe, you may follow the instructions exactly while omitting the parmesan cheese. Once removed from the oven, you can try tossing the green beans in nutritional yeast, your favourite dairy-free parmesan alternative, or leave out the cheese entirely.
Calories: 152kcal | Carbohydrates: 10g | Protein: 6g | Fat: 11g | Saturated Fat: 3g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 6g | Cholesterol: 11mg | Sodium: 227mg | Potassium: 274mg | Fiber: 3g | Sugar: 4g | Vitamin A: 975IU | Vitamin C: 16mg | Calcium: 157mg | Iron: 1mg


As a dietitian, I create recipes with whole food ingredients that provide the nutrients needed for optimal health. My nutrition philosophy does not focus on numbers; however, I understand that this information can be helpful.

Do note that the nutrition info provided is an estimate and I cannot guarantee correctness of the displayed values. These numbers will differ depending on brands used, recipe modifications, and amount eaten. If you require specific nutrition information due to medical reasons, please consult with your dietitian or physician.

Did you make this recipe?

Let me know by leaving a recipe rating below, or by tagging @walderwellness on Instagram. I love seeing your beautiful creations!

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Pinterest graphic for a roasted green beans recipe with parmesan and garlic.
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