The Chelsea forward made his sixth appearance of the tournament in the final against Argentina, coming off the bench just as he had done for the other five.
And the decision to bring the 23-year-old on proved an inspired one from Joachim Low, as Schurrle surged down the left-hand side deep into extra time and delivered the perfect cross for Mario Gotze to score Germany's winner.
"[It was a] fantastic night for us. I still can't believe it," he told ITV Sport after the final.
"It's unreal but we deserved it; we had the 100% will and, if you see how Bastian Schweinsteiger fought, it was crazy."
"[For the goal] I just wanted to run and cross the ball and it was a fantastic finish from Mario Gotze."
"Now we can say we are the Golden generation, because we've won it, we won the World Championship. That's what everybody expected and we did it. I have no words."
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As Opta stats show, Schurrle's assist was his first of the tournament, although he had already scored three goals for his country during his previous five games.
The Chelsea man has proved quite the super-sub for Low's men, then, and will hope his forthcoming season at Stamford Bridge will yield as much success as Germany's World Cup campaign.