http://www.nintendoworldreport.com/blogArt.cfm?artid=17813 
Cooking simulators have populated the DS since Cooking Mama's success, but the idea of a game that actually teaches you how to cook hasn't hit the mainstream in America. The idea was done in Japan back in 2006 when Shaberu! DS Oryori Navi was released; it spawned numerous sequels, including Personal Trainer: Cooking, which was the series' first release in America.
Having the DS transformed into an interactive cookbook is a novel idea, but only if it works well. With close to 250 recipes and a plethora of DS-specific features, Personal Trainer: Cooking works wonderfully and is a fantastic aid for making food. Nintendo even dug into its large game catalog and stowed a cooking-related game, Game & Watch's Chef, into Personal Trainer: Cooking as an unlockable.
It's all very intuitive once you dive in and check out the game's interface, which is easily controlled with the stylus on the touch screen. The in-game voice is clear, and the speed of the male voice can be tweaked to your liking. For easy browsing, all the recipes can be sorted by time required, specific ingredients, or region of origin. Once you're looking at a recipe, you can look at the list of ingredients, what utensils it requires, and step-by-step instructions. There are also pictures of the dish along the way, but they aren't detailed enough to be too helpful. The amount of food to be made can be changed by increasing or decreasing the serving size, which removes the math from cooking. You can even organize a shopping list that is easily accessible from the main menu to help you prepare.
The instructions are relatively descriptive and easy to follow. They can be navigated using the microphone on the DS to avoid dirtying the system when you're making food. The voice commands don't offer too much frustration, but occasionally you'll have to repeat a phrase once or twice. The main complaint I have with it is that, due to the sensitivity of the microphone, it would misinterpret noises and skip ahead several steps while I was busy cooking. Although, the voice commands can be turned off easily if they become too much of an issue.
Personal Trainer: Cooking does what it intends to do and does it quite well. It's easy to use and pretty practical. It might not make you a great chef, but it'll give you some basic tips to further your cooking prowess or, at the very least, show off some dishes that you might have never tried.