I like epicurious a lot because the recipes have been reviewed by "regular" people. You can read the reviews and get good ideas how to modify the recipe- for instance 6 out of 10 people might say a little to bland for our tastes- the next time I would add... Really helpful and specific reviews. In general though I start with
www.info.com and just type in what I am looking for and generally it finds me several sites to look at.
