A 34-year-old woman has been sentenced to life in prison over the microwave-oven death of her one-month-old daughter.

A California judge on Friday imposed the 26-years-to-life sentence on Ka Yang.

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She was convicted of first-degree murder and assault for putting Mirabelle Thao-Lo in a microwave oven for up to five minutes in 2011. Prosecutors say the child sustained fatal thermal injuries.

Investigators found the infant’s pacifier in the microwave at their Sacramento-area home.

Yang’s lawyer says her client had an epileptic seizure and didn’t know what she was doing.

She has a history of seizures, but paramedics say she wasn’t disoriented when they arrived.

She told investigators she blacked out and awoke to find the baby injured next to a space heater.

Yang has three other children.