It depends what kind of frosting :)
69
There is no clear answer, some youngins are old and some oldins are young. Another opinion: At least 80. On the lighter side. This answer was kindly dedicated to Lazarus
If the frosting is homemade, no. If it's store-bought, hasn't been opened, and if it's not past its expiration date it should be fine.
Good becaue pasta never goes bad unless its been wet then dried