Take flour and baking powder and give a mix and keep aside

In another bowl take butter and powdered sugar

Then with the help of hand blender give a mix.

When it becomes creamy add egg one at a time.

Again mix it properly till it becomes fluffy and add sugar vanilla essence at this stage

After that add flour and baking powder to it but now don't use hand blender mix it with spatula..

By cut and fold method..

Add crushed Oreo biscuits into it and give a mix..

Meanwhile u preheat the oven for 5 mins at 180degree

Pour the cake batter into 6"6"cake bowl

Put it into oven for 30 mins

Prick a tooth pick and see if it comes out smoothly then your cake is ready

Take it out and keep it to cool

Garnish with Oreo biscuits

And serve it,if u want u can do frosting with cream or chocolate ganache...