any unit used in linear measurement, as the inch, foot, meter, etc. Origin of linear measure. 1885-1890. First recorded in 1885-90.
Realistically, you could put any icing you wanted on a carrot cake. The wonderful beauty of cooking is that you can make it to your liking. But, the traditional icing that most people put on carrot cake is cream cheese icing.
There is a wide range of frosting and icing including-. 1) Royal Icing-. This uses egg whites and icing sugar. So for frosting a single layer, I use one egg white and 200 grams of icing sugar along with 1 teaspoon of lemon juice. Royal icing is meant to be quite sweet and they use it for decorations of cake and also for piping over cookies.