Hello! Thank you for your question.
Unfortunately, we do not recommend making the Impossibly Easy Cheeseburger Pie in a slow cooker; the mixture (once the beef is cooked) needs to be baked in a 400 degree oven, and slow cookers usually cook things at a lower temperature. Also, an electric skillet will end up steaming the pie if covered, which will not result in the same texture.
Answered 01/18/2013 by mgoetz