Prepare your vanilla sheet cake. Preheat the oven to 350°F (180°C). Spray a 10x15 half sheet baking pan with non-stick spray and line the bottom with parchment paper.
Sift the all purpose flour into a mixing bowl and add the sugar, baking soda and salt.
Add soy milk, vanilla extract, oil and vinegar and mix into a batter. Don't overmix.
Transfer to your prepared baking pan and smooth it out into the corners.
Bake for 20 minutes or until a toothpick inserted into the center of the cake comes out clean.
Prepare your cashew mascarpone. While your sheet cake is baking prepare your mascarpone.
Add the cashews, syrup, coconut oil, salt, vanilla and almond milk to the blender and blend. Transfer the mascarpone to a bowl and set aside.
Prepare your whipped cream. Add the coconut cream (separated hardened cream at the top of 2 chilled cans) to the bowl of a stand mixer, leaving the watery parts behind. Starting at slow speed gradually increase speed until the cream is whipped. Add the powdered sugar and whip again.
Fold the whipped coconut cream into the cashew mascarpone. Place into the fridge.
By this time your sheet cake should be ready, let that cool on a wire cooling rack.
Prepare your coffee syrup. Add the sugar and water to a saucepan and heat, stirring all the while until boiling.
Once boiling, allow to boil for 2 minutes (time it) and then remove from the heat. Dissolve the instant coffee in the coffee liqueur before adding to the sugar syrup and mixing in. Allow to cool before using.
Assemble the tiramisu. When the cake has cooled and the coffee syrup has cooled cut the sheet cake to fit the bottom layer of a square 9x9 dish and pour over half the coffee syrup.
Add half the cashew mascarpone cream mix on top and smooth it down into a smooth layer.
Cut the remaining half of the cake to fit the next layer (it's okay if you don't have one piece but rather have to cut the cake into a few pieces to fit) and pour over the remaining half of the coffee syrup.
Add the remaining half of the cashew mascarpone cream mix and smooth it down.
Sprinkle cocoa powder on top.
Place into the fridge to set for 2-3 hours or overnight to let the flavors soak in. Cut into slices and enjoy.