Frozen roast potatoes cooking times
How long to cook frozen roast potatoes: 35–40 min in the oven at 220°C (200°C fan) and 18–20 min in an air fryer at 200°C. Every way to cook it is below, with the temperature and how to tell it’s done.
How long to cook frozen roast potatoes
Times are for about 600 g, for 4.
| Method | Time | Heat | How |
|---|---|---|---|
| Oven | 35–40 min | 220°C (200°C fan), 425°F, gas 7 | Turn halfway. |
| Air fryer | 18–20 min | 200°C (400°F) | Shake halfway. |
Before you start
Cook from frozen in one layer.
How to tell it’s done
Crisp and golden outside, fluffy inside.
Questions
How long to cook frozen roast potatoes in the oven?
35–40 min at 220°C (200°C fan), 425°F, gas 7. Turn halfway.
How long to cook frozen roast potatoes in an air fryer?
18–20 min at 200°C (400°F). Shake halfway.
Times are a guide for typical home portions: ovens, air fryers, microwaves and the size of what you’re cooking all vary. Check meat, poultry and fish with a thermometer before serving. Safe temperatures follow USDA and UK Food Standards Agency guidance, last checked 11 November 2026.