Usually eat more high-calorie foods and high-fat foods: hamburgers, chicken nuggets, barbecues, peanuts, black sesame paste, cashews, pistachios, almonds, milk tea, chocolates, instant noodles, cakes, biscuits, etc. Peanuts have the best effect on fattening, because they have high calories, and their unsaturated fat is beneficial to the human body. When fattening, you don't have to worry about bad fat entering your body and your classmates' breakfast and dinner every day. These are what nutritionists and classmates said, and they are very useful. I just want to provide you with the effective methods that the nutritionist said, and hope to adopt my answer. Thank you.