1 tin or 400 gms nestle milkmaid condensed milk (my tin was 392 gms and I used the low fat one)
100 gms butter or approximately 1/2 cup at room temperature
1 tsp Vanila extract
175 gms flour sifted
25 gms Cocoa powder
1 tsp baking powder
1 tsp baking soda
1/4 tsp salt if using unsalted butter
200 ml soda water (any liquid drinking soda will do)
Pre heat the oven at 180 degree celcius and grease and line an 8" round baking tin with parchment paper and keep aside.
Sift the flour, baking powder, baking soda, salt (if using), and cocoa powder and keep aside.
In a bowl mix the condensed milk and butter till smooth and creamy without any buttery lumps. Now add the vanilla and mix. Add the flour, alternating with the drinking soda, in three batches beginning and ending with the flour. Mix everything well until just combined. Do not overmix.
Pour the batter into the prepared pan and bake in the pre-heated oven for 30-35 minutes until a toothpick inserted comes out clean. Remove the cake from the oven and let it cool in the pan for 10 minutes and then transfer to a wire rack for cooling completely.