First add vinegar in milk mix it and Keep it aside.
Second add vanilla extract in mango puree mix it well and keep it aside.
Take a bowl add butter then add sugar whisk it for 4-5min or till it becomes soft and light.
Take a strainer seive all the dry ingredients i.e... All purpose flour, baking soda, baking powder.
Add mango puree in butter's bowl and mix it well.
Add all purpose flour mix it by cut and fold method then add milk mix it gently.
Take a cake tin Greece it with butter then sprinkle all purpose flour.
Take a bowl add 2tablespoons plain mango batter in it and in the left batter add cocoa powder and 1 tablespoon choco chips mix it.
Pour chocolate mango cake batter in tin then decorate it with plain mango batter and then sprinkle chocolate chips.
Take a pressure cooker add salt on Base then preheat it on medium flame for 15min.
Put the cake tin in cooker and bake it for 35min on low flame.
After 35min turn off the flame and keep it aside to cool completely then demould it and serve it.
