Sift the flour, baking powder, cocoa powder and keep it aside.
In a bowl take oil, icing sugar and whisk until it's smooth then add in milkmaid and whisk till its fluffy.
Add in milk, vanila essence and mix well. Then add the dry ingredients slowly and stir well, then add some more. (I have added the dry ingredients in 3 parts.)
Next add in beetroot juice, you can increase or decrease the quantity to achieve the desired red colour. Mix the juice in the batter and stir well. Finally add in the baking soda and mix it slowly but only once.
Place the cooker on a gas top on medium flame, add in 2 cups of salt in the bottom, remove the whistle cover and let it heat for 10 minutes.
Grease the baking tin with oil and sprinkle some flour on it. Next pour in the batter and keep it in the cooker then cover it immediately. Bake this on a medium low flame till 35 minutes.
Test if the cake is done after 30 minutes by inserting a toothpick, if it comes out clean it's ready if not then bake for 4-5 minutes. Once baked, take the cake out and let it cool to room temperature then freeze it for 2-3 hours.
For the icing : In a bowl add butter and mix till it's fluffy then add icing sugar in few intervals and continue whipping, next add in whipped cream and vanila essence. Whip for a few more minutes until your frosting is ready.
You will see a creamy, fluffy and very smooth texture in your cream. Take the cake out and let it set for some time, then make a layer. Remove the top and hard sides of the cake and grind it in a mixture along with some beetroot juice.
Take out the powder trimming of the cake and assemble your cake on a round big plate. Apply some sugar syrup then apply cream and spread it evenly using a spatula.
Repeat this process for the remaining 2 layers, also do the icing for the sides using a spatula and with the help of a turning plate.
Decorate the sides with the powder trimmings and beetroot juice mixture. Do the icing on top as per your choice, you can also decorate the top portion with the help of nozzles.
Your cake is now ready to be kept in the fridge till the serving time. Make sure to refrigerate for atleast 45 - 50 minutes before serving.