San Bernardino County homicide detectives are investigating the circumstances of the girl's death who died from complications after ingesting chili powder on Sunday.
Deputies were called to the 20000 block of Cayuga Road when they found the toddler suffering from a seizure after ingesting the powder.
The girl was transported to the hospital where she was pronounced dead.
An autopsy will be performed to determine the cause of death.
Amanda Sorensen, 21, of Apple Valley was arrested following an initial investigation into the toddler's death.
Sorensen is the girlfriend of the toddler's father, said sheriff's spokeswoman Jodi Miller. The names of the toddler and father were not released.
She was booked into the West Valley Detention Center in Rancho Cucamonga and is being held on $500,000 bail.
She is scheduled for court on Jan. 9.
Anyone with information regarding this investigation is asked to contact Detective Rob Trostle or Sergeant Rick Bessinger at 909-387-3589.
Callers wishing to remain anonymous are urged to call the WeTip Hotline at 1-800-78-CRIME (27463) or you may leave information on the WeTip Hotline at Wetip.com.