If you want to know how long to cook baked potatoes in oven at 350, plan on about 60 to 75 minutes for medium russet potatoes. Baked potatoes at 350°F take longer to cook but produce evenly tender results with a subtly crisped skin.
This lower temperature is forgiving. You can walk away, prep the rest of dinner, and still get a great potato.
How Long To Cook Baked Potatoes In Oven At 350
The short answer: 60 to 75 minutes for medium potatoes (about 8 to 10 ounces each). Large potatoes can take 90 minutes or a bit more. Small potatoes may finish in 45 to 55 minutes.
Always check for doneness instead of trusting the clock alone. Ovens run hot or cold, and potato size varies a lot.
Quick Time Chart By Potato Size
- Small (5 to 6 oz): 45 to 55 minutes
- Medium (8 to 10 oz): 60 to 75 minutes
- Large (12 oz or more): 80 to 95 minutes
- Sweet potatoes (medium): 55 to 70 minutes
These times assume you prick the potato, rub it with a little oil, and place it directly on the oven rack or a baking sheet.
Why 350°F Works Well For Baked Potatoes
At 350°F, the heat moves slower through the potato. That gives the starches time to gelatinize fully, which means a fluffy, even interior.
The skin dries out gradually too. You get a light crispness without a tough, leathery shell.
Higher temps like 425°F cook faster, often in 45 to 50 minutes. But the outside can toughen before the center is fully soft. At 350, the margin for error is bigger.
What Happens Inside The Potato
Heat breaks down starch granules and softens the cell walls. Moisture turns to steam inside the potato, which helps it cook from the inside out.
If you wrap the potato in foil, that steam gets trapped. The skin stays soft instead of crisping. Skip the foil if you want a better texture.
Step-By-Step: Baking Potatoes At 350°F
- Preheat your oven to 350°F. Let it fully reach temp, about 15 minutes.
- Scrub the potatoes under cold water. Pat them dry with a towel.
- Prick each potato 4 to 6 times with a fork. This lets steam escape and prevents bursting.
- Rub a thin layer of olive oil or vegetable oil over the skin. This helps it crisp.
- Sprinkle kosher salt or sea salt all over. Coarse salt adds texture.
- Place potatoes directly on the middle oven rack. Put a sheet pan on the rack below to catch drips.
- Bake 60 to 75 minutes for medium potatoes, flipping once at the halfway mark.
- Check doneness with a fork or thin knife. It should slide in with almost no resistance.
Let the potatoes rest 5 minutes before cutting. The inside firms up slightly and stays fluffy.
How To Tell When A Baked Potato Is Done
Use the squeeze test. With a clean towel or oven mitt, gently squeeze the potato. A done potato gives way easily and feels soft all the way through.
A fork test works too. Insert it into the thickest part. If there is any resistance in the center, give it 10 more minutes.
You can also use an instant-read thermometer. The center should read about 210°F.
Tips For Better Baked Potatoes At 350°F
- Choose russet or Idaho potatoes. They have high starch and bake up fluffy.
- Pick potatoes that are similar in size so they finish at the same time.
- Do not wrap in foil unless you want soft skin.
- Oil and salt the skin for a light crisp finish.
- Place potatoes on the rack, not a cold baking sheet, for more even heat.
- Flip them once so both sides cook evenly.
- Larger potatoes need more time, so add 10 to 15 minutes per size jump.
If your oven runs cool, add 10 minutes to the total time. An oven thermometer is a cheap way to check.
Should You Use A Baking Sheet Or The Rack?
Both work. The rack gives better airflow, so the skin crisps more evenly on all sides.
A baking sheet is easier to clean up and works fine if you line it with parchment. Just expect slightly softer skin on the bottom.
Can You Bake Potatoes At 350°F With Other Food?
Yes. This is one of the best things about 350°F. It matches many casseroles, roasts, and sheet pan dinners.
Just keep in mind that opening the oven drops the temp. Add 5 to 10 minutes to the potato time if you are opening the door a lot.
Common Mistakes To Avoid
- Not pricking the potato. It can burst and make a mess.
- Wrapping in foil. It steams the potato and softens the skin.
- Pulling them out too early. An undercooked potato is waxy and dense.
- Cranking the heat to rush things. You get a tough skin and a dry center.
- Forgetting to flip. One side can overcook while the other stays pale.
Also, do not store baked potatoes at room temperature for hours. Cool them within two hours and refrigerate.
How To Reheat And Use Leftover Baked Potatoes
Reheat in a 350°F oven for 15 to 20 minutes. You can also split them and broil the halves for a few minutes to wake up the skin.
Microwave reheating works in a pinch, but the skin loses its crispness. It takes about 2 minutes on high.
Leftover baked potatoes are great for home fries, potato soup, or a quick breakfast hash. Scoop out the flesh and mash it with butter and milk for instant mashed potatoes.
Make-Ahead Option
You can bake potatoes a day ahead. Cool them, wrap in foil, and refrigerate. Reheat at 350°F until hot all the way through, about 20 minutes.
For the best texture, reheat them whole rather than sliced. Sliced potatoes dry out faster in the oven.
Final Timing Reminder
For medium russets at 350°F, plan on 60 to 75 minutes. Check with a fork or squeeze test, and add time as needed.
Potatoes are done when they feel soft all over and a fork slides in easily. Let them rest 5 minutes, then split, fluff, and top with butter, sour cream, chives, or whatever you like.
Once you know your oven and your potato size, this becomes second nature. Start checking at 60 minutes and adjust from there.