When an account owns a recipe, then any of its child accounts will have access to that recipe. From a child's account position, a recipe owned by a parent account is a master recipe.
For a child account that created its own recipes, and is still currently the owner of those recipes, those recipes will not be available to any of its sister accounts (i.e. those at the same account level). However, those recipes will flow up to its parent accounts.
See Also: