I write recipes as part of my job. It's not all about pulling something directly out my head. It's a combination of reading three or four recipes and relying on my experience with technique and knowledge of ingredients. So it's not creating it's 'arranging' and experimentation. The question is then who 'owns' the recipe.
I do take care to note where i received the original material. I do make them available on social media. I have never sold a recipe, unless you count the time spent perfecting the technique in my employer's kitchen. As i formulate a cookbook i need to consider intellectual property law.
I'll keep you posted. Every recipe has a story, that story is definately my intellectual property.