Microwaves work best for heating food with a high water content (they make the water molecules in food vibrate to create heat). The best microwaves in 2026View image in fullscreen Hot competition … the microwaves battling it out for a place on your worktop. It has a generous capacity and plenty of cooking options, including oven, grill, air fryer and steam. Other features to look out forLarger microwaves sometimes offer grill, oven and air fryer modes – or all three. Combi cooking is when one of these styles and microwave cooking are combined for the best of both worlds.