Ka Yang was sentenced on Friday by a California judge who imposed the 26-years-to-life sentence on the 34-year-old mom.
Yang put her infant Mirabelle Thao-Lo in the microwave for nearly five minutes back in March 2011 and was convicted of both first-degree murder and assault, according to KCRA-TV.
Yang, a resident of Sacramento, had pleaded not guilty to the charges.
Mirabelle suffered burns to 80 per cent of her body - some deep enough to damage her internal organs. She was discovered burned from head-to-toe, but her hair and clothes were not singed.
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The baby girl's pacifier was discovered in the microwave.
An affidavit states that Yang told police she blacked out while holding the infant and the baby fell next to a space heater, according to an affidavit.
Her attorney claims she had an epileptic seizure during the 11 minutes she spent alone with the baby.
Yang does have a history of seizures, but was not determined to be disorientated by paramedics, the affidavit said.
"I never thought that with my seizure I will lose my little girl," Yang told KOVR-TV.
Yang is married and has three other children under the ages of 10 who are being cared for by relatives.