I'm pretty lazy but also like low fat food. I made it up using spice cake mix so I don't have to worry about baking powder, spices, etc, and I leave out the oil. Use less water but the same number of eggs per the box.
My husband likes this with cream cheese frosting (not so low fat unfortunately), and it is fast to make. It is a little dense in consistency. I used 8 inch round pans and so the times below are for that size (i.e. follow temperature & times according to box). I have also tried it with apple instead of pumpkin.