ivillage.com used to have exactly what you are looking for. They would ask you type in what you have in your fridge and cupboards, then click search, and they would find recipes containing the ingredients you typed in. I just looked for it, but I couldn't remember if it was part of Good Housekeeping, Redbook, or any other magazine they sponsor online. This is what I did find, and I think it's about the closest you can get to what you're seeking. Take a look around the site, you may find it, as I can't imagine why they would remove it.
http://magazines.ivillage.com/goodhousekeeping/recipefinder/
Also, like was posted above, allrecipes does have that, and here's the exact page.
http://search.allrecipes.com/Recipe/Ingredient.aspx?lnkid=726