The Aaronic Priesthood was restored.
As Joseph Smith and Oliver Cowdery prayed to know about authority to baptize, John the Baptist appeared and conferred the Aaronic Priesthood upon them.
Doctrine or Principle
The Aaronic Priesthood holds the keys of the ministering of angels, and of the gospel of repentance, and of baptism by immersion for the remission of sins.
How can your life be blessed by the Aaronic Priesthood?