Eat Your Books
Then I discovered Eat Your Books, a website that combines the searchability and discoverability of modern technology with the richness (and generally higher quality) of printed cookbooks.
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The core of Eat Your Books is an extensive reference database of the contents of over 160,000 cookbooks and food magazines. It won’t show you any actual recipes because, the company says, that would violate copyrights. (That’s not precisely true; lists of ingredients and simple sets of instructions are not copyrightable. However, recipe introductions and creative instructions can be protected. I suspect the company is trying both to support authors and avoid potential litigation.) Instead, you can search for the name of a dish or ingredient and see matching recipes that come from the books you own.
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A free Eat Your Books account lets you add up to five books or magazines and an unlimited number of sources for online recipes. A Premium membership, which removes those limitations, costs $3 per month or $30 per year.