Research Tip: First, check Wikipedia to see if there is a folklore, mythology or symbolism section about the food or drink that you are interested in; often Wikipedia will include something like that, or even an entire article, like this article about Apple Symbolism. Then you can also use a full-text search of a site like Sacred Texts, Sur La Lune, Baldwin Project, or the Andrew Lang Fairy Books to see what you can find. How you do research for a topic like this really depends on the specific food or drink that you are interested in, and if you let me know what you are looking for, I will see what other kinds of specialized searches I can think of!
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