I'm having a problem with the frosting on my cake drying out too much during the decorating process. It only happens when there is a lot of time consuming decorating involved and the cake is left uncovered for a longer period of time. I try to cover it up as much as possible but it kinda needs to be uncovered to decorate lol. Any tips would be appreciated.

are you using the wiltons buttercream??

No I use my own. 3 sticks of butter per 2 lbs of powdered sugar along with milk and vanilla of course.
 

AThe more powered sugar you use the faster the icing will set. Try using 1 cup butter and 1 lb (4 cups) powered sugar and 2 tablespoons milk add whatever amount you like in the icing I use more than a teaspoon but not to much over