High-calorie foods, such as nuts, avocados, cheese, dark chocolate, fatty fish, oils and butters, seeds, dried fruits, granola and energy bars, and full-fat dairy products, can be beneficial for various dietary needs and preferences. Nuts and their butters are high in nutrition, packed with healthy fats, protein, fibre, vitamins, and minerals. Avocados are high in monounsaturated fats, beneficial for heart health. Cheese is rich in protein, calcium, and vitamins. Dark chocolate is rich in antioxidants and has health benefits. Fatty fish are high in calories due to their fat content. Dried fruits are concentrated sources of calories, while granola and energy bars provide quick energy boosts.