Foodily's new Facebook app allows you to use the service's search engine without leaving Facebook, and to share recipes that you find with Facebook friends. You can search by ingredient, type of cuisine or dish, and you can still "like" recipes and post them to your wall. The app brings all of those features to you and lets you connect with other friends using the app to share and discuss recipes, instead of making you go to Foodily to use them.
Foodily wants to encourage Facebook friends to connect and talk about the recipes they find using the app. If you spend all of your time on Facebook, the app may help you figure out what to make for dinner and get input from your foodie friends in the process.