Ensminger served as interim offensive coordinator for eight games in 2016 after head coach Ed Orgeron replaced Les Miles. The 59-year-old Ensminger returned to his previous position under now-former coordinator Matt Canada in 2017.
LSU and Canada parted ways after the New Year's Day bowl loss to Notre Dame, with Canada to receive $1.7 million as a buyout of the remaining two years on his contract.
Orgeron was critical of Canada's play-calling at various points of the season, and there were reports late in the season of a strained relationship.
Orgeron said in a release Wednesday that it was "in difficult circumstances" in 2016 that Ensminger "put together one of the most explosive offenses LSU has ever seen. ... We did that with Steve Ensminger at the helm, and we're going to do it again."
LSU posted a 6-2 mark and scored at least 35 points on five occasions during Ensminger's time as interim offensive coordinator.
Ensminger, a Baton Rouge native, is a former LSU quarterback who guided the Tigers to three bowl games under coach Charles McClendon from 1977-79.