The long-serving striker’s second half brace downed rivals Blackburn Rovers and send Vincent Kompany’s Clarets back to the top of the Championship table.
The 33-year-old headed home Anass Zaroury’s delivery from close range 10 minutes into the second half as the hosts made their dominance count.
The man of the moment then turned provider 20 minutes later when Burnley’s Belgium Under 21 international struck after goalkeeper Thomas Kaminski had kept out Barnes’s volley.
And it was game over nine minutes from time when the ex-Brighton forward kept his composure to convert from Josh Brownhill’s pass and become the first player since Willie Irvine to score a brace in this meeting.
Here are our ratings from the 3-0 win at Turf Moor.
The man of the moment then turned provider 20 minutes later when Burnley’s Belgium Under 21 international struck after goalkeeper Thomas Kaminski had kept out Barnes’s volley.