Firstly, take a rectangular baking tray and grease it with butter and dust with all-purpose flour and keep it aside.

Now, preheat the oven at 180 C for 10-12 minutes, meanwhile do the preparations.

If you have a dark chocolate bar then cut the chocolate into small pieces and melt it with butter for 1 minute.

In another bowl, Sieve all-purpose flour, baking powder, baking soda and keep it aside.

Now mix together melted butter, condensed milk, and vanilla essence till well combined.

Add dry ingredients to the chocolate mixture and add aerated water at this point and beat it for a minute.

Finally, add some pecan nuts in the batter, and pour the mixture in the prepared greased tin.

Tap the tin and remove any air if possible and finally top with a few more pecan nuts.

Bake it in a preheated oven at 180 C for 20-25 minutes till it is baked properly. Insert a toothpick, if it comes out clean its baked.

Remove the tin from the oven and let it cool at room temperature for 20 minutes before unmoulding it.

Once it cool downs cut into small squares and drizzle it with chocolate ganache.