First grease the pan line it with butter paper and again grease and keep it ready.
Cut the dark chocolate and mix with butter. Melt it either on double boiler or microwave.mix well and remove lumps.
Stir in milk and vanilla essence to make a smooth batter.now add sugar and mix well.
Preheat oven to 180°c. Seive the flour and baking powder. Mix the roasted walnuts.
Now slowly add this to chocolate batter slowly and gently and mix well.
Pour the batter in greased pan and bake for 25-30 min. Upper part turn crisp and check with the toothpick.
Cool it completely and then run knife onto it
For the chocolate sauce mix milk, cocoa powder, sugar, maida, vanilla essence and bring it to boil.
Add butter and simmer for 5-6 mintues. Stir continuously
Once it cool down little pour onto the brownie and enjoy
