No- you want a slow protein- whey's OK, but mix it with milk instead of water. This might sound gross to some people, but when I'm bulking, I've make a post-w/o "dessert" from nonfat cottage cheese mixed with chocolate whey powder and maybe a little chocolate syrup, whirred in a food processor (a mini-processor works best). Add a little skim milk and an ice cube, whir it like there's no tomorrow, and bingo, you have a high-protein (with casein) "ice cream." It's actually pretty tasty!