Update 4/9/2016: After a few years its still my favorite go to app for everything recipe related.
My past review: This app is great. Put in the recipe name and add or delete ingredients you have on hand or want excluded, do a search and voila it tries to find (and usually does) a variation to suit your needs. Many other great features.
Fishingmaniac about BigOven Recipes & Meal Planner, v6.3