1 box cake mix
1 can pumpkin (or 2 c. fresh)
Bake according to your box directions' time and temperature for cupcakes.
You won't taste the pumpkin, but they are super-moist and really yummy. I even let my kids eat 'em for breakfast.
Let me know if you want to know how to cook a pumpkin--makes great fresh pumpkin pie, pumpkin bars, pumpkin bread, pumpkin soup...(yeah, I saw Forrest Gump, too).