Pre-heat oven to 180c. Grease and line tray with baking paper.
Place a saucepan half full with water on a low heat. Place a heatproof bowl in the pan ensuring it is not touching the water.
Add your chocolate and butter in the bain marie - mix until completely melted
Next add the milk, brown sugar, white sugar and coffee. Mix until combined
In a separate bowl, sift the plain flour and coco powder.
Add the baking powder and chocolate mixture into the bowl.
Whisk everything until it's lump free
Fold in the chocolate chips into the mixture
Pour the mixture into the tray and place in the oven
Bake for 15 to 20 minutes. For a gooey brownie you don't want the skewer to come out clean