First prepare the brownie recipe according to the instructions on that recipe post & bake in a 7" springform cake pan that has been greased & lined with parchment paper
Next make the cheesecake batter by placing all of the cheesecake ingredients into the work bowl of your food processor & pulse to blend smooth
Pour the cheesecake batter on top of the baked & cooled brownie in the same springform pan being sure not to let any water seep in from the water bath by wrapping the pan in aluminum foil to seal
Bake in a water bath in a preheated 350°F for 60 minutes
After 60 minutes turn the oven off but leave the cheesecake in the oven with the door cracked open to cool slowly for another 60 minutes
Remove the cheesecake & cool completely at room temperature then refrigerate for at least 2 hours to set or preferably overnight before unmolding.
Next make the chocolate mousse by first whipping the vegan cream to soft peaks and reserve in the refrigerator~ you should have 1½ cup of total whipped volume *All brands whip differently
Melt the chocolate in a large bowl over a double boiler or in a microwave safe bowl. Add the hot coffee, powdered sugar & the vanilla extract whisking vigorously to incorporate to a smooth silky mousse base
Add about half of the reserved whipped cream to the chocolate to lighten it, then fold in the remaining whipped cream
Pour this chocolate mousse into a bowl that is the same diameter as your cheesecake (7") lined with plastic wrap and refrigerate until set ~ approx 2hours
Now flip the bowl of mousse onto the top of the cheesecake and remove the bowl & plastic wrap *see video
Finally you can prepare the ganache icing recipe to pour over the mousse & cheesecake