You can substitute low-fat sugar-free items if you are concerned about the calories.
I have made one similar to this by putting a cookie in the bottom of a lined muffin tin, top with sugar-free pudding, then top with whipped cream, chopped fruit, nuts or coconut. Delicious, especially for a large group!
You can use a lot of different flavors and toppings for this one. Great basic recipe. I hope you will try several different combinations to find one you really like. =^..^=