Are pancakes fattening?

Possibly: Pancakes can be part of a well balanced diet as long as they are supplemented by appropriate foods. By themselves, they are composed mainly of carbohydrates and some fats. Dressing them with syrup increases the carbohydrate exposure. In some, these carbohydrates will be converted to body fat if not utilized by an active lifestyle.

Ingredients&toppings: Pancakes themselves are just simple sugars (even "whole wheat" pancakes are not complex carbohydrates truthfully) with liquid sugar (syrup) and fat (butter) added. So pancakes are a bad nutritional choice made worse. And we can't rescue any health value by adding things like blueberries or cranberries. If you make them with psyllium husk added, you can at least get some fiber in there.