Preheat oven to 180°C / 350°F
Once the mixture is boiling, remove the pot from the heat and add the sugar, flour, salt, bicarbonate of soda and mix until all the ingredients are well combined. Don’t overmix.
Add the whisked eggs, buttermilk and vanilla essence. Mix until smooth and combined.
Pour the mixture into a greased, rectangular baking dish,( 35 X 22 cm and is 4cm deep.) and bake for 30 to 35 minutes or until a skewer inserted into the centre comes out clean.
For the Frosting
Make the frosting only when you are ready to pour it over the cake because if it is made too early, it tends to thicken up a bit and does not pour so easily.