Mix your vegan egg and put it into the fridge for 15 minutes.
Line a small square baking tray with baking paper.
Mix the almond flour, baking powder, baking soda and a pinch of salt together in a large bowl.
Mash up the bananas in a flat bowl. I used a soup plate. Just make sure it is big enough because now you add the cocoa powder. Keep mashing and mixing with a spoon until you have smooth chocolaty mass.
Add the egg and the vegan egg to the almond flour and beat it with a hand mixer.
Add the Kefir and the vegetable oil. Keep mixing.
Add the banana chocolate mix and mix until everything is well combined.
Now mix in the boiling water a little bit at a time. The mixture is very liquid. That's normal.
Pour it into your lined baking tray (7.5 x 5.5 Inch) and bake at 180 degrees Celcius (fan) for 35 minutes or until the top is solid to the touch.
Once the cake is done, leave it to cool completely in the tin before you move it. I'm using an oven-proof container with a lid so I just keep my cake in there.
Here comes the hardest part: Only eat your cake the next day. I know. But it's worth the wait! Enjoy.
Notes
For a normal-sized cake that serves 12 just double the ingredients.