Frustrating isn't it? Trying to find that post you made about cinnamon scones back in 2012. Well, in the absence of a search facility for personal pages, use Google. Just know how to form the right query.
In the Google search box, type the following:
site:facebook.com/username "cinnamon scones"
This should bring up all the posts about this bakery item from your timeline. It's not 100%, because it will only work with 'public' posts indexed by Google, but go ahead, try it. You might be surprised.