Blues suffered a miserable night in Lancashire with a comprehensive defeat at Turf Moor.
A third minute opener from Danny Ings set the tone for an evening to forget for Lee Clark's men. Despite settling after that early blow, Scott Arfield struck another 18 seconds after the interval by heading home Michael Kightly's cross before Ings bagged his second in the 54th minute.
The only positive for Blues was the first-team debut of another academy starlet with 17-year-old midfielder Reece Brown replacing Darren Ambrose in the 51st minute.
After putting in what Clark admitted was his side's worst performance of the season by 'a million miles', Blues got exactly what they deserved on a cold and rainy night.
It was a disastrous start as Ings raced through a gap in the Blues backline to latch on to Sam Vokes' diagonal ball and fire home.
Ings was struggling to believe his luck as he was almost presented with a second inside three minutes. A low ball from the left found the 21-year-old six yards out but he poked wide with the goal at his mercy.
Blues soon settled and Chris Burke showed hope for the visitors with a darting run into the Burnley box from the right before flashing a low drive across the face of goal.
Ings was proving to be a menace and headed wide from Kightly's cross before Vokes watched a low, right-side shot from 20 yards fizz wide of Darren Randolph's near post.
Any fresh game plan that Clark had laid down at half-time quickly unraveled as Arfield set the Clarets on their way to a comfortable victory and their best start to a season for 12 years.
Straight from kick-off, Kightly picked out the rising head of Arfield in acres of space with a ball from the right and the Scotsman's header dipped into the far corner.
Clark was quick to make tactical changes with Mitch Hancox replacing Shane Ferguson and Brown, who put in a promising display despite the circumstances, entering the fray for Ambrose.
Arfield turned provider in the 54th minute as his flicked header fell into the path of Ings, who had his opponents back peddling before firing beyond the onrushing Randolph.
The wet surface was causing both sides problems and a slip from Dan Burn almost gifted Ings his hat-trick but he blasted high and wide from the right side of the area.
Blues struggled to find any sort of rhythm after that and will swiftly look to bounce back on home soil against Sheffield Wednesday this weekend.