1Combine cake mix and ingredients for cake mix on low speed with hand mixer for 30 seconds, turn up to med-high and beat for 2min until smooth and fluffy.
Divide batter in cupcake liners, and bake in pre heated 350 oven for 18-22min or until toothpick comes clean. Cool in pan for 10min. Transfer to cooling rack and let cool completely (about an hour)
On medium speed beat cream cheese and butter until fluffy for 2min. On low gradually beat in confectioners sugar, sugar, then sour cream and vanilla until combined. On med-high beat 2min till light and fluffy.
Pipe or spread frosting on each cupcake. Decorate as desired.