Crush the biscuits into a fine powder in a mixer.
Add powdered sugar, cocoa powder, and milk.
Mix it with spatula properly till you get a consistent batter
Add Eno and stir it again.
Grease the butter in the cake mold
Preheat the oven to 180 degree
Pour the batter into the mold
Place it in the oven at the same temperature.
To check your cake, insert a toothpick or a clean knife in the middle of your cake and if it comes out clean, it means the cake is baked properly.
Let the cake cool down, then take it out from the mold.
Your cake is ready!
For icing or topping
Mix dark chocolate, cream, and powdered sugar in a bowl.
Microwave it for 2mins.
Mix it properly
You chocolate icing is ready.