The day began at 05:15 for Jurgen Klopp, with Thiago Alcantara
The hosts were dangerous on the counter-attack and had several chances to give themselves some breathing space.
Forest went ahead in the 55th minute when Awoniyi poached a rebound after his initial effort struck the post.
Jurgen Klopp's side were off the pace in the first half as a disciplined Forest side knocked them out of their rhythm.
"It has to be a turning point. If we can beat Liverpool, we can beat anyone," Forest's Ryan Yates said.
Even with several injuries they were expected to roll over a Forest side finding life tough back in the elite.
But Steve Cooper's side were magnificent as they gained a result that could kickstart their season.
Jurgen Klopp’s Liverpool continue to struggle at the start of the season as they suffered this shock defeat after pulling off successive 1-0 home wins against Manchester City and West Ham at Anfield.
Forest were compact and a threat on the counter attack with Jesse Lingard shooting straight at Alisson from one break.