How Long to Cook Roasted Potatoes
Diced or quartered potatoes roasted in the oven until crispy.
The Short Answer
In the oven at 425°F, roasted potatoes takes 30–40 minutes. Scroll down for all cooking methods, detailed instructions, and tips from the Professor.
Cooking Methods
🔥 Oven
Temperature: 425°F
Time: 30–40 minutes
Toss with oil, salt, and pepper. Spread in a single layer with space between pieces. Flip once halfway through. Done when golden brown and crispy on the outside, tender inside.
💨 Air Fryer
Temperature: 400°F
Time: 15–20 minutes
Cut into small, even cubes. Toss with oil. Shake basket every 5 minutes.
For the crispiest roasted potatoes: parboil for 5 minutes first, drain, shake the colander to rough up the edges, then roast. Those roughed-up edges are what get impossibly crispy in the oven.
Frequently Asked Questions
Yukon Golds are the gold standard. They have a creamy interior and crisp up beautifully. Russets work too but tend to be drier inside.
The Bottom Line
Roasted Potatoes is straightforward to cook when you know the time and temperature. Use the method that fits your equipment and schedule, and always let the food rest before cutting or serving. Resting allows juices to redistribute and carryover cooking to finish the job.
Source: Culinary reference | Last verified: March 19, 2026 | Our methodology