How Long To Bake A Sweet Potato At 350?

Are you tired of constantly googling how long to bake a sweet potato at 350 degrees?

Well, look no further! 

In this blog post, we will provide you with all the information you need to make the perfect baked sweet potato every time.

Whether you are a seasoned cook or a beginner in the kitchen, knowing the exact cooking time and temperature for your sweet potatoes can make all the difference in achieving that fluffy, caramelized perfection.

So sit back, relax, and let us give you the perfect tips to bake a sweet potato at 350.

Let’s go!

What Is Sweet Potato?

The sweet potato, scientifically known as Ipomoea batatas, is a root vegetable distinguished by its vibrant orange flesh and sweet, starchy flavor.

Often confused with yams, sweet potatoes are an entirely different species, boasting a rich nutritional profile including fiber, vitamins A, C, and B6, potassium, and manganese.

This versatile tuber can be enjoyed in a myriad of culinary applications, from baked goods to savory dishes, and is celebrated for its ability to complement a wide range of flavors.

Potatoes and sweet potatoes differ botanically, nutritionally, and in taste. 

Potatoes, or Solanum tuberosum, belong to the nightshade family and typically have a white flesh and earthy taste.

They’re an excellent source of vitamin C, potassium, and starch. 

Sweet potatoes, on the other hand, are from the Morning Glory family.

Their orange flesh is sweet and rich in fiber, beta-carotene, vitamins A and C.

While potatoes can come in various textures, sweet potatoes are generally softer when cooked. 

Both are versatile and healthful, but they offer different flavors and benefits to the diet.

How Long To Bake a Sweet Potato At 350?

We have come through some basic information about a sweet potato. So, how long to bake a sweet potato at 350?

The answer is right below.

Baking a sweet potato to perfection at 350 degrees Fahrenheit largely depends on its size. 

For small to medium sweet potatoes (about 2-3 inches in width and 5 inches in length), it typically takes about 45 to 50 minutes.

During this time, the heat causes the natural sugars to caramelize, giving the flesh that signature sweet, tender texture.

If you have larger sweet potatoes (those that are 3 inches or wider and longer than 5 inches), the cooking time increases.

You might need approximately 60 to 70 minutes for these heftier specimens.

For those who prefer their sweet potatoes to be exceptionally soft and well-done, extending the baking time for an additional 10 to 15 minutes beyond these guidelines can achieve that extra creamy consistency. 

Also, keep in mind that the actual baking time can be affected by the oven’s accuracy and how consistently it maintains the set temperature.

To ensure your sweet potatoes come out exactly as you like them, consider testing them slightly before the recommended cooking time. 

This way, you can adjust the remaining time as needed without risking an overbaked or undercooked potato.

It’s always a good idea to give each potato a gentle squeeze – if it’s soft, it’s ready to be taken out of the oven.

Remember, to guarantee even baking, it’s best to place the sweet potatoes on a baking sheet lined with parchment paper and not overcrowd them.

This ensures they all cook at the same rate. After baking, let the sweet potatoes rest for about 5 minutes to allow the insides to settle, then they’re ready to enjoy.

How Long To Bake a Sweet Potato At 350 In an Air Fryer?

Cooking sweet potatoes in an air fryer at 350 degrees Fahrenheit is a quicker alternative that yields a nicely crisped exterior with a fluffy interior.

For a medium-sized sweet potato, you can expect the baking time to range from 30 to 50 minutes. It’s advisable to give them a turn at the halfway mark to promote even cooking.

Begin checking for doneness around the 30-minute point by piercing the sweet potato with a fork – it should feel tender throughout.

Keep in mind that varying sizes will require adjustments in cooking time, with smaller sweet potatoes needing less and larger ones more time.

How Long To Bake a Frozen Sweet Potato At 350?

We’ve gone through the time needed for baking sweet potatoes at 350 with different methods and kitchen appliances.

However, occasionally the time to bake a sweet potato becomes complicated to measure because the potato is frozen, or you forget to take it out of the fridge. 

Do not worry, we still have some tips for you to solve this case.

Baking a frozen sweet potato at 350 degrees Fahrenheit allows for a convenient and time-saving option without compromising on texture and taste.

Generally, a frozen medium sweet potato will take approximately 75 to 80 minutes to fully cook through.

It’s important to note that there’s no need to thaw the sweet potato before baking; it can go straight from the freezer to the oven.

To ensure thorough cooking and a desirable softness, wrap the frozen sweet potato in foil before placing it in the oven.

This helps to trap steam and heat, cooking the sweet potato evenly.

Always check doneness by inserting a fork into the thickest part of the sweet potato; it should pierce the flesh smoothly when completely cooked.

Adjust cooking times as necessary depending on the size of the sweet potato, with larger ones requiring additional time.

How Can You Know A Sweet Potato Is Fully Cooked?

In addition to knowing how long to bake a sweet potato at 350, recognizing when it is fully cooked is also crucial.

Here are a few ways to tell if your sweet potato is ready:

1. When pierced with a fork, the flesh should be soft and tender throughout.

2. The skin should have a slight crispness on the outside while being easy to peel off.

3. The sweet potato’s internal temperature should measure 205°F (96°C) using an instant-read thermometer.

4. If cut in half, the sweet potato should be easily sliced through without any resistance.

5. The sweet potato’s color may become darker and more vibrant when it is cooked.

By keeping these signs in mind, you can have confidence in knowing that your sweet potato is fully cooked and ready to be enjoyed! 

What Temperature Should a Sweet Potato Be Cooked To? 

To achieve the perfect texture and sweetness, sweet potatoes should be cooked to an internal temperature of 205°F to 212°F (96°C to 100°C).

This ensures that the flesh is fully soft and the sugars have caramelized to enhance flavor.

Using an instant-read thermometer is the most accurate way to determine if a sweet potato has reached this temperature.

Whether roasting, baking, or grilling, monitoring this specific internal temperature will yield a sweet potato that’s cooked to perfection.

Can a Sweet Potato Be Covered While We Bake It At 350?

It is not always necessary to cover a sweet potato while baking at 350 degrees Fahrenheit, as this can depend on the desired outcome.

Leaving the sweet potato uncovered can result in crisper skin, especially appealing if you enjoy a bit of texture contrast.

However, if you prefer your sweet potatoes to be more moist and tender throughout, wrapping them in aluminum foil can help.

The foil traps steam and promotes even heating, preventing the skin from getting too tough.

Whether to cover them or not often boils down to personal preference and the specific recipe you’re following.

Should You Pre-boil a Sweet Potato Before Baking?

Pre-boiling a sweet potato before baking isn’t necessary, as it primarily depends on your time constraints and cooking method preference. 

Pre-boiling can shorten the overall baking time and ensure a softer texture inside.

This could be desirable when you’re pressed for time or want to guarantee even cooking, especially if the sweet potatoes vary in size. 

However, baking sweet potatoes without pre-boiling allows for a slower caramelization of their natural sugars, which can enhance the flavor.

The decision to pre-boil should be based on these considerations and how they align with your cooking schedule and texture preferences.


In conclusion, now we have the detailed answer to the question of how long to bake a sweet potato at 350.

Whether you choose to bake, air fry, or cook a frozen sweet potato, there’s no need to stress about timing.

The key is knowing the size and type of sweet potato you’re working with and using simple tests like inserting a fork or checking the internal temperature to ensure its readiness.

By understanding these basics and experimenting with different cooking methods, you can enjoy perfectly cooked sweet potatoes.

Happy baking!

Chef Chip Roman is one of the most exciting and talented chefs in Philadelphia. He has his own catering business, Charles Roman Catering, as well as Roman Restaurant Group which includes Blackfish, Mica, and Ela. He graduated from Drexel University in 2002 with a degree in business and culinary arts. Chip Roman is a classically trained chef who has worked in some of the most prestigious kitchens and chefs in Philadelphia, including Le Bec Fin’s George Perrier and Marc Vetri’s Vetri.

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