The night before you want to bake the cake, combine together the flour, coconut oil, water, and sourdough starter in a bowl. Cover the bowl with plastic or beeswax wrap, a plate, or a damp tea towel and leave it on the counter overnight or at least 4 hours. It should roughly double in size.

The next day, preheat the oven to 350 degrees Fahrenheit or 180 degrees Celsius.

In a separate bowl, combine the eggs, vanilla, honey, salt, and milk.

Then pour the egg mixture into the sourdough mixture, and mix until smooth.

Add the baking soda.

Pour the batter into the cake pan.

Bake for 25 minutes. Test that the cake is done by dipping a sharp knife or toothpick into the centre of the cake. It should come out clean.

Let the cake cool before icing.

In a sauce pan, combine cream cheese, powdered sugar, cocoa powder, and butter.

Heat everything over low heat on the stovetop and stir until well combined.

Use a spatula to spread the icing onto the cake, once the cake is completely cooled.