In a bowl, mix eggs with salt and sugar until the sugar is completely dissolved. Then pour the oil, rum essence and milk into the composition one by one and mix well. Then add flour and baking powder.
We pour into a bowl about 150 milliliters of the composition. Add the cocoa over the less composition and mix well. Pour the yellow composition into a tray (greased with oil and powdered with flour), and over it the composition with cocoa, which we pour in a straight line in the middle of the cake. Bake the cake at 180 degrees C for 35 minutes, then leave it to cool and it is only good to serve !!!