How To Cook Frozen Green Beans In Oven

How to Cook Frozen Green Beans in Oven: Easy Methods

Last Updated on May 19, 2024 by Shari Mason

Cooking frozen green beans in the oven is incredibly easy and produces a delicious result. I still vividly remember the first time I used this simple method.

The beans came out perfectly tender-crisp with a delightful roasted flavor. Today, I’ll share how to cook frozen green beans in the oven. 

There’s no need for fancy ingredients or complicated steps – just some basic know-how and you’ll have a tasty side dish in no time. Read on. 

Easy Steps To Cook Frozen Green Beans In Oven

Frozen Green Beans


  • Frozen cut green beans 
  • 2 tablespoons of olive oil
  • 1 teaspoon of salt
  • 1 teaspoon of garlic powder
  • Half a teaspoon of onion powder
  • Freshly ground black pepper 

Instructional Guide:

  1. Preheat Your Oven: Set your oven to a high temperature of 450 degrees Fahrenheit for preheating. Maintaining this high heat is crucial for achieving the ideal texture when roasting frozen green beans.
  2. Prepare the Beans: Keep the green beans frozen; there’s no need to thaw them. Combine frozen green beans in a mixing bowl with two tablespoons of olive oil. Add half a teaspoon of onion powder, one teaspoon of salt and garlic powder, and, if you like, a pinch of freshly ground black pepper. Toss the green beans thoroughly to ensure they are evenly coated with the seasonings and olive oil.
  3. Spread on a Baking Sheet: Arrange the seasoned green beans evenly on a baking sheet, ensuring they are well-distributed for even roasting.
  4. Initial Roasting: Place the baking sheet in the oven and roast the green beans at 450 degrees for 15 minutes. This initial high-heat roasting helps lock in flavor and maintain a pleasing texture.
  5. Add Parmesan (Optional): If you want to add a creamy dimension to the flavor, sprinkle 1 cup of parmesan cheese [1] evenly over the green beans after the initial 15-minute roast. Do not stir the cheese in at this step.
  6. Continue Roasting: Return the baking sheet to the oven and roast for 15 minutes. After this time, gently stir the green beans.
  7. Achieve Desired Crispiness: The final step is to roast the green beans until they reach your preferred level of crispiness, which may take an additional 5 to 15 minutes, depending on your oven and the type of baking sheet used. Keep a watchful eye to prevent overcooking.

How Long Does It Take To Cook Frozen Green Beans?

The cooking time for frozen green beans varies depending on your method. If you choose to boil them, it typically takes 5-8 minutes on the stovetop or microwave. 

However, if you roast them in the oven, the process will take approximately 15 minutes. 

“Nothing will benefit human health and increase the chances for survival of life on Earth as much as the evolution to a vegetarian diet.”

Albert Einstein, Theoretical Physicist

Roasting frozen green beans at a temperature of 450 degrees Fahrenheit helps maintain their ideal texture and brings out their delicious flavor. 

But how can you make frozen green beans taste good?

Should You Thaw Frozen Green Beans Before Cooking?

No, there’s no need to thaw your frozen green beans before cooking. Thawing is unnecessary in this case. Going straight from the freezer to the pan or oven is better. 

Cooking frozen green beans directly from their frozen state preserves their desired crunchiness and vibrant color. 

Thawing can lead to a loss of texture and color, resulting in a less appealing dish. 

So, save time and enhance the quality of your green beans by cooking them directly from the freezer – it’s the simplest and tastiest way to enjoy them.

Are Frozen Green Beans Still Good To Eat?

Frozen Green Beans on a Baking Pan

Yes, frozen green beans are safe to eat and retain their nutritional value. They are a convenient and nutritious choice.

Frozen green beans, like fresh ones, boast essential vitamins and minerals.

Moreover, frozen green beans are a reliable source of dietary fiber [2], promoting healthy digestion and preventing constipation. 

What Causes Green Beans To Spoil Quickly?

The primary culprits behind green beans spoiling quickly are moisture and improper storage. 

When green beans are washed, they absorb moisture, accelerating their spoilage and creating a favorable environment for bacterial growth. 

“Frozen green beans may start in the freezer, but with the oven’s help, they end up as a delectable, crispy, and irresistible side dish.”

Eat Pallet Restaurant & Food Advice

To extend their freshness, it’s essential to store green beans properly. Place them in a vegetable crisper or an airtight plastic container to maintain their crispness and prevent moisture buildup. 

While keeping them in the original store-bought plastic bag is an option, be cautious as condensation may develop inside, potentially accelerating spoilage. 

Also Read: Basic Steps To Freeze Green Beans Without Blanching


What causes frozen green beans to become mushy? 

Frozen green beans can become mushy if not blanched adequately before freezing. 

Or cooking frozen green beans directly without allowing excess ice to thaw can lead to a pool of water in the pan, resulting in overcooked, soft, and soggy. 

Find out what causes green beans to spark in the microwave here.

How long can cooked green beans be stored in the freezer?

Store cooked green beans in the freezer; they will maintain their quality for 8 to 10 months.

Properly freezing them in airtight containers or freezer-safe bags helps maintain quality and prevents freezer burn.

What causes white spots on frozen green beans?

White spots on frozen green beans are typically caused by freezer burn. Freezer burn occurs when frozen food is exposed to air, leading to dehydration on the food’s surface. 

What’s the optimal temperature for storing frozen vegetables?

The optimal temperature for storing frozen vegetables is 0°F (-18°C). When you keep your frozen vegetables at this temperature in the freezer, they remain safe for consumption. 

Final Thoughts

Cooking frozen green beans in the oven is a simple process. You don’t need to thaw the beans; cooking them directly from the freezer helps retain their desired texture and vibrant color. 

Seasoning them with olive oil, salt, garlic powder, and onion powder, and optionally adding parmesan cheese, creates a flavorful and nutritious side dish. 

Roasting 450 degrees Fahrenheit for about 15-30 minutes produces perfectly crispy and delicious green beans. 

Aside from that, frozen green beans are convenient and nutritious, which are a healthy addition to your diet, offering numerous health benefits. 


Shari Mason

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