Preheat oven to 150 C. Grease and flour an 8?-9? inch baking pan.
Sieve maida, baking pwd, baking soda, salt and cocoa pwd, thrice. Keep aside.
Cream the sugar, melted butter, condensed milk and water till smooth using a wooden spoon or hand blender.
Slowly add little flour-cocoa mixture. Follow this procedure till the dry ingredients are completely blended with the wet ingredients. Add vanilla essence and combine well.
Bake in preheated oven for 45-50 mts or till a toothpick inserted into the cake comes out clean.
If you want to frost the cake follow this icing recipe – Sieve 1 cup icing sugar with 2 tsps cocoa pwd, slowly add little hot water till it forms a flowing consistency. Place cake on a plate and pour the icing all over the cake