In a small bowl, combine the instant coffee, boiling water and melted butter and stir until coffee has dissolved.
In another bowl combine the sweetener, coconut flour, baking powder salt, and hazelnut flour.
Add the coffee mixture to the dry ingredients, then add egg and stir until mixture is completely combined.
Grease a coffee mug with butter or coconut oil. Add the cake batter into the coffee mug. (You will want to make sure the coffee mug is a similar size to your serving glass)
Place the coffee mug in the microwave and cook on high for 1 minute.
Let the cake sit for 1-2 minutes and remove cake from mug by tipping the mug upside down onto a plate.
Set cake aside to cool completely.
MASCARPONE FILLING
Seperate the egg white from the yolk and place into 2 seperate bowls.
Whisk the egg white until it form stiff peaks.
In the other bowl, combine egg yolk, vanilla, sweetener and salt and whisk until pale in colour and thick in texture.
Add mascarpone to the egg yolk mixture and whisk to combine.
Add the whipped egg whites to the mixture and fold to combine. Be careful to not knock all the air out of the egg whites.
Assembly
Cut the cake in half. You should end up with 2 evenly sized discs.
In your 2 serving glasses, place one quarter of the mascarpone mixture into each glass
Place the cake discs into each glass on top of the mascarpone layer
Pour half a teaspoon of brandy evenly onto each cake.
Divide the remaining mascarpone filling evenly on top of each cake disc.
Using a tea strainer, lightly dust some cocoa powder on top of each tiramisu to serve.
Video
Notes
NOTE: THIS IS BASED ON THE INGREDIENTS WE USED, NUTRITIONAL INFORMATION MAY VARY DEPENDING ON THE INGREDIENTS USED.