Turn on oven 350°F (175°C). Line 9x13 inch or 28x28cm mold with baking paper.

Sift flour, salt, and cocoa powder. Then set aside

Cut chocolate into small pieces. Put inside a medium heat proof bowl. Add butter and coffee powder. Melt over double boiler.

When the chocolate is melted, add caster and brown sugar. Whisk it until most of the sugar dissolved. Remove from heat.

Add in 3 eggs first. Whisk until combined, then add the last 2 eggs and vanilla extract. Whisk until combined.

Using spatula, Add in the flour mixture until 70% mixed then add choco chips and nuts and stir again just until no flour lump. Do not stir too much.

Put inside the mold and bake for 30min or until skewer comes clean. Do not over baked or the brownies will be dry.

Let it cool on baking tray before cutting.