These are my favorite cupcakes, and the reason I always have canned pumpkin in my house regardless of the time of year.
I have done different variations of this cupcake recipe, but this one is extremely easy. The recipe comes from Libby's Pumpkin.
1 box of spice cake mix
1 15 oz. can of pumpkin
1/3 cup canola oil
1/3 cup water
Mix together and place in a cupcake liners and bake for about 18 minutes at 350 degrees.
I top mine with my perfect cupcake frosting recipe: http://workingmomwonders.blogspot.com/2013/05/perfect-cupcake-frosting.html
For my mom's 50th birthday party, I turned the cupcakes into a 50.