I am intrigued by the gradual disappearance of the noun "cook" from general usage, esp. in written language.
I can't even count the times when I read an obituary of someone who liked to cook for his friends and family and the obit called him/her "an enthusiastic chef".
I've always thought that "chef" meant a professional in charge of a whole kitchen that employs other cooks. ("Chef" means "boss" in some languages.)
But now, cookbooks and magazines refer to the "home chef", "amateur chef", everyone's a chef these days. Your grandma would be one too. I am not trying to start a general whinefest about the decline of linguistic skills, manners and general culture in the US, but how do *you* use the words chef and cook?
I'm most definitely a cook, and not a very good one at that. Never aspired to chefness.