Preheat Oven: Preheat your oven to 160°C and line a muffin tin with 4-6 cupcake liners.
Add the dried cassis bark to your tonic water and let it infuse
In a medium bowl, cream together the butter and sugar until light and fluffy.
Beat in the egg and vanilla extract until well combined.
In a separate bowl, whisk together the flour, baking powder, and salt.
Remove the dried cassis bark from the tonic and add the dry ingredients along with the tonic water to the egg mixture. Mix until just combined.
Divide the batter evenly among the cupcake liners (if using), filling each about ⅔ full.
Bake for 15-18 minutes, or until a toothpick inserted into the center comes out clean.
Allow the cupcakes to cool in the tin for a few minutes before transferring them to a wire rack to cool completely.
Decorate with cherry flavored buttercream and the Secco cherries