Recently I was helping someone out who was wanting to know if they can find a particular cookie in Safari. This is a very simple thing to do. With this you can remove just one particular cookie, batch a group together or remove them all in one go.
To find your cookies, go to Safari -> Preferences then you have the screen below
If you click on "Remove All Website Data" it will do just that, however if you do want to select specific cookies, then click on the Details button. Once you do you see the screen below
From here as you can see you can click on a cookie, or use the search field for a specific one. Once you have one or a batch highlighted then click Remove, followed by Done.
I am always interested in feedback so please feel free to add any comments, or you can mail me here. If you would like to submit a quick tip with full credit and links back to your site then also feel free to contact me.