Woolheater reportedly told police she "lost it" because the boy would not swallow the pieces of hot dog she was trying to feed him for breakfast.
Her boyfriend Lucas Diel held the food to the boy's face as she hit him.
She claims she then left the room and Diel continued to beat up the little boy.
She then came back into the room and saw the boy, bruised and bleeding.
She only called for help once he stopped breathing.
Anthony died in hospital, two days after the attack, on May 6, 2018.
The attack was the final in a long history of abuse of the boy, who was malnourished at the time of his death.
Diel denied hitting the lad and tried to claim he had simply fallen out of bed.
He was convicted of second-degree murder and received a 49-year sentence for the crime.
Judge Jeff Syrios told the mum she failed her son "in the very worst way possible".
