To make a cream cheese icing, can I use cottage cheese?
It is true that you can use the cottage cheese, you could even use ricotta cheese which Italians have a Ricotta Cheese Pie and Sambucca Liqueur is used as a flavoring.  It is delicious.  Using cottage cheese, which I have, really does not taste good, not only in my opinion but others who have tried to cut calories.  Either use less cream cheese with less powdered sugar and no butter for the frosting or just dust it with the powdered sugar.  The first answer is correct, yes you can, but the taste ruins your carrot cake no matter how finely you blend it. So my answer is no, don't do it.    Good Luck