Do you have to Paten homemade BBQ sauce resell or use offer a business recipe put on their menu?

In the United States, recipes are not protected by copyright. This means that while you don't have to patent or protect a recipe, you may still want to take steps to protect your intellectual property. For example, you could watermark any photos of your recipe, or use a non-disclosure agreement for anyone who has access to your recipe. You could also consider filing your recipe with the United States Copyright Office. This does not provide copyright protection, but will at least provide a timestamp of when the recipe was in your possession.