In a small bowl, stir the cherries with the maple syrup. Add more maple syrup if desired. Set aside in the fridge until needed.
Add the cream to a large bowl (if using an electric mixer), or a stand mixer with the whisk attachment. Whip the cream according to packet instructions. Chill the cream in the fridge until needed.
Add all the mousse ingredients to a small food processor or blender. Blend until the mixture is as smooth as possible. Taste test the mixture and adjust if desired.
In 3 or more serving glasses, layer the whipped cream, chocolate mousse and macerated cherries as desired. Make sure you add the cherry syrup with the cherries. Top with additional fresh cherries and chocolate servings.
Serve the black forest dessert cups immediately, or store them covered in the fridge until needed. The assembled cups keep well for around 6 hours in the fridge, depending on the stability of your whipped cream (see Note 1).
