Preheat oven to 350 degrees and line cookie sheets with parchment paper.

Combine cake mix, eggs and oil. (I like to sift my cake mix before to make mixing very easy.) You can mix by hand or using a mixer. 

Make dough balls roughly the size of a golf ball and place 2 inches apart on baking sheets.  Gently press down just a little bit on each dough ball, you don't want them to bake up too tall!  

Bake for 6-9 minutes.  The cookies will look "dry" as opposed to wet but they won't be firm.  They will firm as they cool! My oven bakes a little hotter so I never exceed 6 minutes.  Let cool on cookie sheets for 2-3 minutes and then transfer to cooling racks.

Cream Cheese Frosting: Beat cream cheese, butter, vanilla and 2 1/2 cups powdered sugar. Scrape down the bowl occasionally to keep the frosting smooth.  Continue to add more powdered sugar until the frosting is sweet enough for you or stiff enough to pipe.  I like to keep my cream cheese frosting from being overly sweet.  

Frost cooled cupcakes and top with berries if desired!