Roasted Frozen Green Beans

These roasted frozen green beans are crispy, cheesy, and bursting with flavour! Topped with melty parmesan and sesame seeds, this easy 5-ingredient side dish comes together in just 30 minutes.

Green beans are easily one of my all-time favourite veggies and the fact that they’re so budget-friendly when bought frozen is a huge bonus! These garlic and parmesan roasted frozen green beans are about to become your new go-to side dish. My family and I absolutely devoured them — the whole tray disappeared in one sitting!

What I love most about this recipe is how versatile it is. You can enjoy it year-round; serve them warm as a cozy holiday side, or chilled for a refreshing summer dish. They’re ridiculously easy to make too: no thawing, trimming, or rinsing required (a lifesaver when you’re cooking a big meal!). Just toss, roast, and in 30 minutes you’ve got crispy, golden green beans that taste like you spent way more effort than you did.

Ingredients You’ll Need

• Frozen green beans: You’ll find these in the freezer section of most supermarkets — either whole or cut into smaller pieces. Both work perfectly, though smaller pieces will roast a little faster. This recipe uses about 500g / 1 pound of frozen green beans, but don’t worry if you’re slightly over or under!
• Olive oil: I find olive oil gives the best flavour, but you can easily swap it for another mild, nutritious oil like avocado oil if you prefer.
• Seasonings: I love keeping it simple with garlic powder, salt, and black pepper — it lets the parmesan and sesame shine while adding just the right amount of savoury flavour.
• Parmesan: Freshly grated Parmigiano-Reggiano gives the best taste and texture. For a vegan or dairy-free option, use nutritional yeast or your favourite dairy-free parmesan. You can also skip it entirely — the beans will still taste amazing!
• Sesame seeds: A sprinkle of toasted or untoasted sesame seeds adds a subtle nutty crunch that pairs beautifully with the crispy beans. Use them as a garnish right before serving.

Complete list of ingredients and amounts is located on the recipe card below.

How to Make Frozen Green Beans

Preheat the oven: Set your oven to 200°C / 400°F and line a baking tray with parchment paper.

Prepare the green beans: Spread the frozen green beans evenly over the tray (no need to thaw!).

Season: Drizzle with olive oil, then sprinkle with garlic powder, salt, and pepper. Use your hands to toss everything together until the beans are evenly coated.

Add cheese: Sprinkle grated parmesan evenly over the top of the green beans.

Roast: Transfer the tray to the oven and roast for about 20 minutes, or until the beans are lightly crispy and the cheese is melted and golden.

Finish and serve: Remove from the oven, top with a little extra parmesan and a sprinkle of sesame seeds, then serve hot and enjoy!

Serving Suggestions

These roasted frozen green beans are best enjoyed straight from the oven while they’re hot and crispy. They make the perfect side dish for just about anything Hidden Veggie Coconut Milk Pasta sauce, Cottage Cheese Mashed Potatoes, Honey Paprika Salmon or One Pot Cajun Chicken Orzo (Risoni). You can also serve them alongside other sides like these beautiful Sautéed Sweet Potatoes for a complete meal.

Storing Leftovers

Store any leftover green beans in an airtight container in the fridge for up to 3 days. To reheat, simply pop them back in the oven for a few minutes until warmed through and crispy again — or enjoy them cold in salads for an easy, flavourful addition.

Recipe FAQ

More Vegetable sides

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Sesame Roasted Butternut Squash & Sweet Potatoes

Sumac Cauliflower With Tahini

Hot Honey Roasted Carrots

f you try this roasted frozen green beans recipe or have a question, please let me know! Leave a comment and rate it below. I love to hear what you think, or any changes you make.

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