In a small blender combine the sweet potato puree, carob and maple syrup.
Taste and adjust carob and maple syrup according to taste.
Frost your cake with this and voilà! Bon appétit !
Notes
Please keep in mind that the nutritional information is calculated using a nutrition facts calculator. It is a rough estimate and can vary greatly based on products used.I'm giving you some proportions but keep in mind that you should modulate those according to your own taste.