Can a cake made from a mix (pudding, extra egg, sour cream added) be covered with a 1/8th or 1/4th" thick piece of fondant and be ok?

Hi yummy, all the cakes that I have done are covered with fondant, and I use a cake mix with an extra egg, buttermilk, sour cream and a small package of dry pudding mix. The cake holds up very well because the mixture is somewhat dense.

Thank you.