A young Arizona mom who abandoned her 17-month-old daughter in the desert was sentenced to 20 years in prison this week.

Ashley Denise Attson committed “an intentional cold-hearted, horrendous killing of an innocent child,” Judge David Campbell said at Monday’s sentencing.

Attson, 23, left her daughter in the desert in in the nation’s largest American Indian reservation for four days in September 2016, returning only to bury her child in an animal hole, the Washington Post reported.

The tragic child was born with methamphetamine in her system and was in the custody of tribal social services for the majority of her short life.

Her mother regained custody two months before the murder, and seemed unaffected following her savage act, officials said.

“Over the next few days, she met with friends for ice cream and posted pictures of herself on Facebook,” the U.S Attorney’s Office for Arizona said.

Attson pleaded guilty to second-degree murder.

The maximum punishment she could have received with her plea would have been life in prison. Bernadine Martin, a former chief prosecutor for the Najavo Nation, said she was disturbed by the sentence.

“Twenty years is simply not enough,” she said.