Never thought I’d see the day when Dr. Fraud Rippetoe gets recommended on HN. That guy is overweight and out of shape and his lifting advice injures 99%+ of people who take it. Tread lightly when following the incredibly stupid teachings of Mark Rippetoe, man.
That's actually part of Mark Rippetoe's bulking diet. It's apparently the best combination of calorie density and beneficial nutrients. There's a section on diet on Starting Strength, if you are interested.