The two easiest muffin/cupcake recipes ever -
take one box yellow cake mix
one can pumpkin
about 1/2 tablespoon pumpkin pie spice
mix, then bake according to directions on box
I haven't frosted them but bet they'd be to die for wih cream cheese frosting
also you can do the same with a chocolate cake mix and a can of pumpkin
mix and bake as directed, then chill in the fridge.