The 27-year-old scored just twice in 15 Premeir League games for the 'Foxes', but has been reborn since joining the Bundesliga outfit.
In the end, the chance to score on his return to England was somewhat gifted to him on Wednesday night as City conceded a penalty just 16 minutes in.
A corner was only half clearend and the the ball was powered goalwards, Aymeric Laporte was adjudged to have pulled back Benjamin Hubner as he attempted to get on the end of it.
The referee immediately pointed to the spot, with Kramaric stepping up to do the honours from 12 yards.
It was a very confident penalty from the forward as he chipped the ball down the middle to decieve Ederson and bring the German side back into contention for third place in Group F.