Adrian Ramos is filling in quite nicely for Pierre-Emerick Aubameyang, providing a goal and an assist to put Dortmund ahead by two goals.
Ramos found an oncoming Gonzalo Castro at the top of the box for a finish past Alex Manninger to give Dortmund its first lead of the day.
Only five minutes later, the Colombian was on the offensive once again. His first attempt was denied wonderfully by Manninger, but the rebound came right back to Ramos who finished his second attempt with ease.
BVB are still in complete control of the possession, with 75.8% on the day.
Felix Passlack was inserted into the lineup for Nuri Sahin just prior to the first goal, and is jumping into the play nicely despite his defensive posture.
Dortmund appear to be well on their way to a victory, leaving them still five points behind Bayern Munich for the Bundesliga top spot with seven games remaining.