Preheat the oven to 350 degree F. Line an 8 inch square pan with parchment paper and grease it with butter/cooking spray
Boil water in a sauce pan. Add chocolate and butter in a separate wide bowl. When the water starts boiling, sim the stove and add the wide bowl over the sauce pan
Melt the chocolate and remove from the heat
Add coffee powder, cocoa powder, sugar, vanilla extract and mix well
Add eggs one by one and beat well after each addition. Eggs added to hot sauce may curdle so make sure chocolate is not very hot
Combine flour and salt in a separate bowl and add it to the wet mixture. Stir in the chocolate chip
Transfer the contents to the greased pan and bake for 25 - 30 minutes until a toothpick/fork inserted in the center comes out with a little sticky brownie (few moist clumps clinging to it). Cool it and enjoy the brownie warm/chilled with chocolate sauce/whipping cream