Preheat oven to 350 degrees and line a 12-count muffin tin with cupcake liners.
Using a large bowl, whisk together the chocolate crumbs and sugar. Gently mix in the melted butter until a sandlike mixture forms.
Spoon 2 tablespoons of crumb mixture into each cupcake liner. Using a flat bottomed glass, gently press down to make a firm crust layer.
Bake the crust in the oven for 5 minutes. Remove, place on cooling rack and allow to cool completely. Reduce the oven temp to 250 F degrees.
Using a large bowl, beat the cream cheese and sugar until combined and smooth. Add (room temperature) melted chocolate.
Beat in the egg until combined. Beat in the pure vanilla extract and the Kahlua until combined.
Spoon about 2 tablespoons of the cheesecake batter into the cupcake liners. Gently tap the pan onto the counter to release any large bubbles in the batter.
Bake for 25 minutes or until the centre doesn’t jiggle.
Remove from the oven and allow to cool to room temperature before placing in the fridge for a few hours (or overnight).
Using a small bowl beat the heavy whipping cream and icing sugar until stiff peaks form.
Remove paper cupcake liners from cheesecakes.
Scoop into piping bag and pipe whipped cream onto the top of each of the cheesecakes.
Sprinkle a dusting of espresso powder (or cookie crumbs) over the cheesecakes.
Serve immediately.