Januzaj skilfully cut back to beat an opponent before firing goal-ward to see his effort take a couple of deflections on the way through in the 18th minute of Dortmund's eventual 2-1 win.
The 20-year-old took to Twitter to post his delight at scoring so early into his spell with the Schwarzgelben:
Happy to score my first goal for @BVBpic.twitter.com/ZP5CMBlhFs
— Adnan Januzaj (@adnanjanuzaj) September 8, 2015
The match, which took place in Hamburg, was organised in order to raise awareness of the refugee crisis currently enveloping Europe.