N Large 2 is good but pricey and back in the day I used a product called Mammoth 2200 or something like that, where each serving (4 scoops) is 2200 calories. It mixed good and tasted great but damn you gotta take lots for the full serving, so I ended up taking about half. I have never been a fan of weight gainer shakes though my biggest advice to you is JUST EAT MORE OF EVERYTHING....learn to be a human garborator through natural food and you will size up with mass quickly....worked for me but be careful not to put too much shitty fat on cause it will be brutal later on ....also very hard on the body, but what the fuck isnt nowadays....