My cooking coach isn't really a game but a selection of well over 200 healthy recipes for you to munch your way through - 250 I think in total if you have the new DSi console.
Better than a traditional recipe book and here's why:
1) TAILORED TO YOU: When you first load the game, it asks you your preferences on food. You can specify how many people you normally cook for as well as ingredients which you like or dislike. This means that you don't need to waste time looking through recipes that you couldn't eat anyway - say if you had an allergy or food intolerance.
2) PLAN AHEAD: A calender is included so you can easily plan what you are eating for the week or month ahead. Add your recipes to the shopping list tool so you can see what you need to buy at a glance. This has made shopping online an absolute breeze for me because the ingredients are all listed out for you. If you were going shopping in store, just take your DS along. With recipe books, I end up scribbling out lists on dozens of post-it notes which takes forever.
3) EASY COOK: To cook a recipe in your kitchen, I turn off the option for voice recognition (it works very well but I like to go back and read the screen for myself) and place my DS in a clear plastic food bag. You can then tap your DS screen even with sticky fingers! The step-by-step instructions are very easy to follow (technical terms are always explained further without having to click out of the recipe you're cooking) and ingredients for the recipe are easily accessed at any point. If anything requires timing, a timer is provided for you with the correct time already set up!
4) GREAT FOR THE HEALTH CONSCIOUS: I've tried many of these recipes now and haven't had a single one which has turned out wrong. They might be healthy (the calories for each one displayed) but they taste really nice and have given me a much more varied diet. While there are plenty of starters and main courses - there aren't very many desserts to choose from. I don't eat puddings so this isn't a problem but if it's puddings you're after, look elsewhere.
5) SPEEDY SEARCH: With a daily suggestion for you and a quick search function so you can look up recipes with certain ingredients (handy when you're limited to what you have in your cupboard) as well as a favourites section - choosing meals becomes a breeze.
As a digital recipe book, this is great. I also have What's Cooking? with Jamie Oliver on DS which is also very good but has about half the recipes available here.