350°F is the standard temperature most recipes call for when baking potatoes in a conventional oven. So if you are wondering how long to cook baked potato in oven at 350, the short answer is 60 to 75 minutes for a medium russet potato. That range depends on the size of your potato, how you prep it, and whether you wrap it in foil or not.
This guide breaks down the exact timing, the best methods, and the small details that make a big difference. You will get clear times for small, medium, and large potatoes. You will also learn how to tell when a baked potato is truly done.
How Long To Cook Baked Potato In Oven At 350
At 350°F, a medium potato (about 8 to 10 ounces) needs roughly 60 to 75 minutes. A large potato (12 ounces or more) can take 80 to 95 minutes. Small potatoes (5 to 6 ounces) are usually ready in 45 to 55 minutes.
The oven temperature is lower than the common 400°F or 425°F many people use. That means the cook time is longer. But 350°F gives you a fluffy inside and a nicely crisped skin if you do it right.
Quick Time Chart For Baked Potatoes At 350°F
- Small potato (5 to 6 oz): 45 to 55 minutes
- Medium potato (8 to 10 oz): 60 to 75 minutes
- Large potato (12 oz or more): 80 to 95 minutes
- Foil-wrapped medium potato: 70 to 80 minutes
Always add 10 to 15 minutes if you are baking several potatoes at once. A crowded pan slows down the cooking process.
Why 350°F Works Well For Baked Potatoes
350°F is a moderate heat. It cooks the inside of the potato slowly and evenly. The starches soften and turn fluffy without drying out. Higher heat can cook the skin too fast while the center stays firm.
This temperature is also handy when you are baking something else at the same time. A roast, a casserole, or a batch of chicken often cooks at 350°F. You can slide the potatoes onto the same rack and save energy.
The Science Behind The Cook Time
A potato is mostly water and starch. Heat has to travel from the skin to the center. At 350°F, that takes about an hour for a medium potato. The potato is done when the internal temperature hits about 210°F.
If you have a meat thermometer, poke it into the center. That is the most reliable way to check doneness. No guessing needed.
Step-By-Step Instructions For Baking Potatoes At 350
- Preheat your oven to 350°F. Let it fully heat for at least 15 minutes.
- Wash and scrub each potato under cold water. Pat them dry with a towel.
- Poke the potato 6 to 8 times with a fork. This lets steam escape and prevents bursting.
- Rub a little olive oil over the skin. This helps it crisp up.
- Sprinkle sea salt on the outside. It adds flavor and texture.
- Place the potatoes directly on the oven rack or on a baking sheet.
- Bake for 60 minutes, then check with a fork or thermometer.
- Add 10 to 15 minutes more if the center is still firm.
Let the potatoes rest for 5 minutes before cutting. The steam inside finishes the cooking process.
Should You Wrap Potatoes In Foil At 350°F?
Foil traps steam and softens the skin. It also speeds up the cook time a bit. A wrapped medium potato takes about 70 to 80 minutes at 350°F. An unwrapped one takes 60 to 75 minutes.
If you want a crispy skin, skip the foil. If you want a soft skin and a very moist inside, wrap it. Both ways work fine at this temperature.
Foil Wrapping Tips
- Use heavy-duty foil to avoid tears.
- Wrap tightly so steam stays inside.
- Open the foil for the last 10 minutes to firm up the skin.
Factors That Change The Cooking Time
Not every potato cooks at the same speed. Here are the main things that affect timing at 350°F.
Potato Size And Variety
Russet potatoes are the classic choice for baking. They are large and starchy, so they take longer. Yukon Gold and red potatoes are smaller and waxier. They often cook 10 to 15 minutes faster.
Oven Accuracy
Many home ovens run hot or cold by 25°F or more. If your oven runs cool, add 10 minutes. If it runs hot, check early. An oven thermometer is a cheap tool that solves this problem.
Altitude
At high altitude, water boils at a lower temperature. Potatoes can take 10 to 20 percent longer to cook. Adjust your time upward if you live above 3,000 feet.
Number Of Potatoes
One potato cooks faster than four. When you load up the oven, the heat has more work to do. Spread them out so air can move around each one.
How To Tell When A Baked Potato Is Done
You do not need to guess. Use one of these simple tests.
- Pierce the center with a fork. It should slide in with almost no resistance.
- Check the internal temp. It should read 210°F.
- Squeeze gently with a towel. A done potato gives slightly under pressure.
- Look at the skin. It should feel dry and slightly wrinkled.
If the fork meets any resistance in the middle, put it back in for 10 more minutes.
Common Mistakes To Avoid
Small errors can lead to a dry or undercooked potato. Watch out for these.
- Not poking holes. The potato can burst and make a mess.
- Using a cold oven. Always preheat fully.
- Baking at too low a temp. Below 350°F, the potato may never crisp.
- Pulling it out too early. A firm center means it needs more time.
- Cutting it open right away. Rest it for 5 minutes first.
Serving And Storing Your Baked Potatoes
Slice the top open with a knife. Push the ends toward the middle to fluff the inside. Add butter, sour cream, chives, cheese, or bacon. Serve hot.
Leftover baked potatoes keep in the fridge for 3 to 4 days. Wrap them in foil or place them in a sealed container. Reheat in the oven at 350°F for 15 to 20 minutes. A microwave works too, but the skin will not stay crisp.
Can You Bake Potatoes Ahead Of Time?
Yes. Bake them fully, cool them, and store them in the fridge. When you are ready to eat, reheat at 350°F until warm all the way through. This usually takes 20 to 25 minutes.
Final Timing Recap
At 350°F, plan on about 60 to 75 minutes for a medium potato. Small ones take 45 to 55 minutes. Large ones need 80 to 95 minutes. Foil adds about 10 minutes. Always check with a fork or a thermometer before serving.
With these times and tips, you can bake a perfect potato at 350°F every time. Adjust for size, altitude, and your own oven, and you will get a fluffy inside with a skin that holds up to any topping.