SousChef interacts with an optional online database of other SC users to allow you to share your culinary creations. Each time you enter a new recipe, it can be sent to the database where others can look it up and create the same dishes you do. If you have a collection of secret family recipes, you can turn off sharing. It would be nice if this were available for each recipe, instead of affecting your entire library.
You can search through your recipes by ingredient; this allows you to find only the recipes that you can execute using the items you have on hand, without a trip to the store. You can search using multiple ingredients, and if you find an ingredient that you don't have, you don't need to make another shopping run -- just use SousChef's built-in substitutions. The application ships with several substitution suggestions, but you can also add your own in the preferences.