Air fryer racks and trays let you cook more at once or separate the food so the air circulates better. They're a simple accessory, but it pays to choose one with your basket's measurements in front of you.

• Second-level rack. Lets you place food on two levels, for example vegetables below and protein above.
• Suitable tray or dish. Works for recipes with sauce or batter, like a cake in a pan.
• Support rack. Lifts the food off the bottom and lets air pass underneath.

1. Measure the inside of your basket or drawer, not just the advertised diameter.
2. Check the material and that it's suitable for the cooking temperature and, if that matters to you, for the dishwasher.
3. Check the height so the food doesn't touch the heating element.
4. Avoid piling up: two levels with little airflow don't cook better than one well-spread level.

Combine them with perforated liners and check the times in the approximate cooking times chart.

• Filling them to the top. If the food touches the heating element or leaves no gaps, it burns or doesn't brown.
• Choosing the wrong size. A rack that doesn't sit properly moves around with the airflow.
• Forgetting to clean them. Racks collect grease at the joints; wash them after every use.

No. It has to fit in your basket, be suitable for high temperature and not touch the heating element. Measure before you buy.

Yes on many models, but the times change. Watch the height of each level and don't pile the food up.

It depends on the material and the manufacturer. Check the product's instructions.

• Air Fryer Accessories: What's Actually Worth Buying — The air fryer accessories you'll actually use: perforated liners, racks, silicone moulds, tongs and oil sprayers, with tips for choosing them.
• Air Fryer Liners: Types and How to Use Them — Air fryer liners: perforated parchment, baking paper and silicone, what they're for, how to place them so they don't lift, and what to check before buying.
• Silicone Moulds for Air Fryers — Silicone moulds for air fryers: what they're for, which recipes they allow (eggs, cakes, croquettes) and what to check before you buy them.
• Air Fryers: How They Work and How to Choose Yours — Everything about air fryers: how they work, types (basket, oven, dual-basket), what to check before buying, and links to brands, guides and recipes.