In another Beat the egg yolks water and sugar until light.
Add the marg./butter and beat around 1 minute.
Add the flour coffee and cocoa and beat until combine.
Add the lukewarm milk mix until alls combined.
Gently fold in the egg whites.
Put in the baking paper lined and lightly oil sprayed slow cooker and bake for 2hrs on HIGH
Once its baked leave it too cool in the slow cooker bowl and before trying to take it out put it in the fridge for a few hrs to let the custard set for easy removal without making a mess and having it break up