Pre-heat oven to 160°C. Grease and line the base of an 18cm square cake pan

Melt butter and chocolate together in a double boiler, then remove from heat and allow to cool slightly

Beat the sugar, vanilla and salt into the mixture

Whisk eggs one at a time into chocolate mixture. Beat well

Add flour, beating until smooth

Fold crushed Cobs Hip Chips through mixture

Pour mixture into prepared pan, smoothing the top. Bake for 40 minutes or until a skewer comes out with a few moist crumbs attached (not a sticky batter)

Allow to cool then dust with sifted cocoa powder