Chop the chocolate into small pieces.

Add the pieces to a heatproof bowl and add cocoa and coffee powder.

Heat the cream in a small saucepan over medium heat until it comes to a simmer.

Pour the hot cream over the chocolate.

I like to scoop my ice cream ahead of time and keep it in the freezer until we are ready to eat it.

Let stand for 30 seconds, and whisk until smooth.

Add the marshmallow.

Mix until combined.

Pour over ice cream.