Heat the oven to 350 degrees. Place paper in cupcake molds.
In the electric mixer, mix the yellow cake mix with the pumpkin and the rest of the ingredients until creamy.
Pour the cake mix into each pan and bake for 15 to 18 minutes.
Let cool to decorate. Beat the buttercream or frosting and add the vegetable orange color and mix until the color matches the frosting. Place in a piping bag with a round or star-shaped tip. Decorate with the frosting or buttercream and the chopped walnuts.
NOTE: For this recipe you will use a regular cupcake mold, if you use a mini cupcake mold the mixture will make 24 mini cupcakes.