Preheat the oven to 350℉ then grease & parchment line 3 - ⅛ sheet pans
First pull of the hard stem of the oranges if there are any & check for seeds by slicing them in half & remove seeds if there are any. The skins stay on the orange, so leave that intact.
Place all of the cake ingredients into a food processor including the oranges & process until smooth batter (about 1 minute)
Pour batter into your prepared cake pans bake for approximately 15-20 minutes or when a toothpick inserted into the center comes out clean.
Cool in the pans until you are ready to assemble the cake
Set up a cake mold the way I demonstrate in the video tutorial
Prepare the chocolate mousse: Whip your favorite vegan whipping cream to medium peaks then reserve in the refrigerator
Whip the aquafaba/agar with the cream of tartar to stiff peaks while adding the sugar very slowly
Melt the chocolate in a large bowl over a double boiler or in a microwave safe bowl. Add the hot brewed coffee & the vanilla extract to the melted chocolate while whisking vigorously to incorporate well.
Cool the chocolate mixture to at least 80°F or slightly cooler or when you add the whipped cream it will melt back to liquid. Add the reserved whipped cream & whisk smooth
Now take a small portion of the AF meringue & fold into the chocolate mixture to lighten. Then fold in the rest gently
Pour the mousse equally in between each cake layer as you build the cake inside the assembled cake mold, refrigerate to set for at least 4 hours or overnight.
Un mold the cake and then add the ganache icing over top