Prepare a cake pan by greasing, lining and dusting and set ready (I use a 7 inch diameter one for the round pans)

Separate the egg yolks and whites

Beat the white till it stands in stiff peaks and set aside

Cream the yolks, vanilla essence and sugar together till the quantity is doubled and the mixture is fluffy

Add the butter and milk to this and beat to incorporate.

Add the baking powder and maida and combine

Fold in the egg whites till fully combined

Pour the batter into the prepared cake pan. Set this into a dry pressure cooker on top of a small stand so that the base of the pan is not in contact with the base of the pressure cooker. Close without the whistle

Bake on high flame for first 2 min, medium for next 5 min and on low for around 25-30 min. Cake is done When a skewer inserted in the center comes out clean