Pre-heat an oven to 180°C (350ºF) and grease a 7" / 18cm cake tin (I used a springform pan).
Melt the coconut oil and set to one side.
In a food processor, blitz the dates and just one tablespoon of milk together until a paste forms. Pour into a large bowl or stand mixer.
Add the egg and beat in, followed by the remaining milk and cooled coconut oil.
In a separate bowl, combine the dry ingredients and then slowly add to the wet ingredients until a batter forms.
Pour into the prepared tin, smooth the top over, and bake for around 20 minutes (an inserted skewer will come out almost clean when ready). Allow to cool.