A deep fryer is a kitchen appliance designed for cooking food by submerging it in hot oil. This method allows for even cooking and creates a crispy texture on the outside while keeping the inside moist. Deep fryers come in various sizes and can be used for frying a wide range of foods, including potatoes for fries, chicken, and doughnuts. Most deep fryers have adjustable temperature settings and safety features like automatic shut-off to prevent overheating. Some models are equipped with baskets for easy food handling and draining excess oil. Using a deep fryer can enhance the flavor and texture of many dishes, making it a popular choice for home cooks and professional kitchens alike.