# 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.

Source: https://feastflow.co.uk/frozen-roast-potatoes-cooking-times (FeastFlow free cooking-time guides). Last checked 11 November 2026.

## How long to cook frozen roast potatoes

Times are for about 600 g, for 4.

Frozen roast potatoes: cooking times by method:

| Method | Time | Heat | How |
| --- | --- | --- | --- |
| [Oven](https://feastflow.co.uk/oven-cooking-times) | 35–40 min | 220°C (200°C fan), 425°F, gas 7 | Turn halfway. |
| [Air fryer](https://feastflow.co.uk/air-fryer-cooking-times) | 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.

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Times are a guide for typical home portions: ovens, air fryers, microwaves and sizes vary. Check meat, poultry and fish with a thermometer. Safe temperatures follow USDA and UK Food Standards Agency guidance.

FeastFlow also plans a whole meal backwards from serving time, with every dish timed and oven temperatures that don’t clash: https://feastflow.co.uk/