It’s easy to vary the filling of these croissant sandwiches. Try apricot preserves instead of cherry, or strawberry cream cheese instead of plain. These would also be delicious with a savory filling, such as chive-and-onion or garden vegetable cream cheese and very thin slices of ham; omit the powdered sugar.
Croissants vary in size. The ones we used were 4x5 inches; if yours are smaller, you might need more to use up the other ingredients.