Just save the report and then in the dashboard builder add a panel of type "chart" and select your saved report from the "Saved search" dropdown. This should do the trick 😉
The easiest way to do this is to use the dashboard editor to create and edit custom dashboards. You can find a tutorial here:
However, the Splunk view system can be configured to provide interactive forms and sophisticated dashboards if you are willing to dive a bit deeper. Read more about creating views at:
Good question -- I was wondering the same thing. FWIW, although @johnvey's answer is helpful, I really think @sigfried's answer below deserves the checkmark, since it actually answers your question directly.