Put plain flour, baking powder,baking soda n coco powder in a bowl n mix it well
Then add sugar n butter in it n mix it well
Then add milk n curd in it..n mix it well
Grease cake mould with butter
Then put batter
Then preheat oven for 10mins..
Then bake a cake on 180 degree for 15mins..
Let it cool..
Decorate it with jems..