In a bowl mix condensed milk and butter and beat till it becomes light and fluffy.

Now add vanilla extract, flour and milk gently fold the mix. Incorporate everything well. Now add soda bi carb. Gently fold in the mix.

Take 1/4 of the batter in separate bowl add cocoa powder in it and mix it. Now we have two batters. One is vanilla flavoured another is cocoa flavoured.

Now grease a tin using butter and flour . Firstly add vanilla batter then add cocoa batter repeat this step. Now cake is ready to bake.

Bake at 140°C for 45 mins. You can even garnish it with almond flakes. Cool it and serve it. You can keep it for around 10 days. Enjoy the cake !