Grease the bowl of a slow cooker.
In a mixing bowl, whisk together the flour, sugar, cocoa, baking powder, and salt.
Add the coconut milk, butter, and vanilla to the bowl and whisk in until a smooth batter is formed.
Pour the batter into the greased slow cooker and spread to level.
In a small bowl, combine the 3/4 C. Coconut Palm Sugar and the 1/2 C. Cocoa Powder.
Sprinkle over the top of the cake batter in the slow cooker.
Mix together the honey and hot water.
Pour over the top of the cake, cover with a lid, and cook on high for 1 1/2-2 hours. Cake is done as soon as it is puffed and firm on the top. The liquid chocolate lava will be on the bottom of the cake.