- Place a metal stand inside the wide  pan/kadai and preheat it on a medium flame for 10 minutes. 
- Grease 8 inch cake mold with butter or oil. Dust some flour and tap it to remove excess flour. 
- You may line the mold with parchment paper also. 
- In a mixer jar blend all the leftover biscuits and make a fine powder. 
- Transfer the powdered biscuit  mixture into a bowl. 
- Then add sugar and cocoa powder. After that, slowly and gradually add the milk to the biscuit mixture. 
- Make a smooth batter by blending it with a whisk. 
- In the last add Eno/fruit salt to the batter and add a teaspoon of milk over the fruit salt and give a really quick mix. 
- Pour the batter into the prepared cake tin. Tap it on the kitchen counter few times to remove any air bubbles. 
- Place the cake tin in the preheated kadai and cover it. 
- Let it cook for 30-45 minutes on low flame. 
- Check the cake by inserting a toothpick in the middle part of the cake. 
- If the toothpick comes out clean,  remove the tin from the pan and allow it to cool. 
- Otherwise, cook for another 2-3 minutes more. 
- Next, un mould the cake into a plate by sliding a knife and running it all over the edges of mold. 
- Place this cake on wire rack to cool. Once cooled pour the leftover caramel over it. 
- Garnish it with grated Amul chocolate. 
- Slice the cake and enjoy!