Sieve flour, baking powder, milk powder, and baking soda and keep aside.

In a bowl Cream the butter and sugar whip till its get fluffy. Add milk and mix well until creamy, add  vanilla essence.

Take 1/4 of the prepared batter, add coco powder and coffee mix well and keep aside. Now your both the batters are ready.

Place a butter paper in a mould, Pour vanilla mixture, and then chocolate mixture make a swirl  pattern with the help of fork.

Bake it in a preheated oven at 190 degree for 40 minutes. Cool down the cake for 10mins then invert.

Cut down into slices and enjoy.