No dirty rice is from New Orleans

Yes, I wouldn't try it with Zatarains though because the ingredients are different. Other then this, you could definitely cook dirty rice in a rice cooker.

The origin of dirty rice or rice dressing as some call it is New Orleans, Louisiana.

Dirty rice is a traditional Cajun dish made from white rice cooked with small pieces of chicken liver or giblets, which give it a dark ("dirty") color.

make rice then throw dirt in the pot and then take the rice out and mix the cajun spice with it