You can turn any of your Buzzes into a template simply by going to its settings panel  and under the ‘Advanced’ toggle  turning ‘Template’ to ‘on’ .
Note: This will turn the Buzz into a template, meaning it won’t show up in your list of Buzzes anymore, only in your template list. (View all the templates you have owner or author access to by clicking ‘Templates’ in the right hand nav panel.) Importantly, this applies to the audience participants of your Buzz (ie without edit rights) as well - they won’t see the Buzz in their Buzzes anymore, but it will show up as a template for them to use when creating new Buzzes.
Hint: If you have an existing Buzz you’d like to turn into a template, but want to keep using the existing Buzz as is, simply duplicate the Buzz, and turn the new copy into a template.