Eat in a calorie surplus every day
Increase portion sizes at meals
Add calorie-dense foods like nuts, nut butters, cheese, avocado, olive oil, and dried fruit
Drink high-calorie beverages like milk, smoothies, and shakes
Eat more frequently throughout the day
Choose refined carbs and starchy foods like rice, pasta, bread, potatoes, and oats
Include protein with each meal
Reduce physical activity if you want to gain fat faster
Limit cardio and other high-calorie-burning exercise
Track your body weight regularly
Increase food intake further if weight is not rising
Sleep enough to support appetite and weight gain