- In a large bowl add Butter/Oil and Sugar whisk well with a fork or a whisk. Beat for 2 minutes add milk and mix well.
- In another bowl add flour, baking powder, and baking soda mix well and sieve them.
- Now add vanilla essence to the liquid mixture and whisk well. Gradually add in the sifted flour and whisk without any lumps. Finally, add vinegar and mix thoroughly. Make sure there are no lumps found.
- Take a baking tin or cupcake mold and grease them with butter on all sides. Now sprinkle some flour on all sides. Tilt the tin on all sides to coat flour all over. Now slowly pour the batter into the tin and dab them to remove air bubbles or pierce them.
- Now place the tin on the oven or the top of the salt in the pressure cooker. Put the lid on with gasket and do not put the whistle of the cooker or Bake in the oven at the same temperature for 30 minutes.
- Now open the lid and check the cake by piercing in the middle with a knife. Bake until you get a clean knife.
- In the cooker, you just check after 20 minutes of baking. If it is underdone just bake for 10 minutes more