The original carrot cake recipe called for mashed potatoes to be used. Today most modern carrot cake recipes just have a buttercream frosting.
Sometimes pineapple, pecans and shredded coconut is also added to the mix. It all depends on the recipe you choose to use.
Many people will enjoy making a carrot cake with a chocolate or vanilla frosting and some nuts or dried fruits.
Other people like to add other fruits to the mix such as strawberries, bananas, raisins, pineapples, and even oranges.
You can use any variety of fruit in your carrot cake recipe that is not too high in sugar or cream.