Yeah, most recipes originally came from classic recipes that were handed down from mother to daughter, back in the olden days before there were even chefs, but when the chefs started cooking in restaurants (and for royalty), most of them were probably trained in similar ways of classic methods in culinary schools. I believe that most TV chefs were also trained in the “classic methods” although many, now are also coming out of their own restaurant situations where they were either self taught or learned from other non-culinary school chefs that cooked in their own restaurants and passed down their wisdom from their own parents (who cooked in the home) and then they took those recipes, used them in their own restaurants and then taught other younger (untrained cooks) how to cook.
You can probably tell that I watch a lot of Diners, Drive-ins and Dives and Chopped! So I hear the stories of how the “chefs” were trained and how the recipes came to be. On triple D I would say that the majority of restaurant owner/chefs were trained by their own parents, either in the restaurant itself, if it’s an old restaurant, or they learned at home and took their parents recipes into their restaurants. But gravy, even coming down through the generations is likely to be similar to gravy in other restaurants, with a few tweaks and surprises. And some chefs on triple D have come from a more classic culinary training, but have brought their skill and expertise into what looks like a diner, but with more upscale dishes. The best of both worlds. On chopped (where I think the judges are really mean, and the challenges are silly, because in a real restaurant chefs would probably not choose to pair Captain Crunch cereal with raw octopus) most of the chefs either went to culinary school and either own or work in restaurants or they’re self taught, but either teach cooking or write cookbooks or run catering businesses. Most of the folks on that show, do not work in Mom and Pop style restaurants and didn’t learn from their parents. But even so, if they have to make gravy, there’s will still be similar to the gravy made by the folks on triple D (or by Giada, or Paula Deen, bless her heart, or Rachel Ray or the Neelys, love me some Neelys!)
But either way, some recipes, for say Mac and Cheese or meatballs or minestrone soup are going to have the same basic ingredients, with a few minor tweaks here and there. Not sure, under what conditions you are allowed to take an online recipe or one from a cookbook and make one or 2 changes and call it an original recipe.
I tweak recipes all the time, sometimes to a pretty good degree, and in that case, I call them my own original recipes. But if I was only changing amounts or one or 2 ingredients (unless it was something major, like using tomatoes instead of strawberries) I wouldn’t call it my original recipe.
I just put together a CD of recipes for my cousin’s 50th birthday. It’s not for sale or anything like that, so I’m not worried about copywrite infringement (but I would worry about that, if I was making a blog or a cookbook for sale). I found 50 recipes (4 of which were my original recipes) and cut and pasted the ingredients list and the instructions into a Word document that I formatted, so that they all looked similar in style and fit onto one page, for easy printing (or not if she wants to save a tree) then I saved it as PDF file, so it wouldn’t accidentally get altered or deleted.