Directions:

• 1

  Preheat oven to 180°C. Line a 22 x 30cm baking pan with baking parchment.Set aside.

• 2

  Place butter and chocolate in a medium heatproof bowl set over a saucepan of simmering water; stir frequently, until almost melted. Remove from heat; stir until completely melted.

• 3

  With a hand-held electric mixer, whisk the sugar, vanilla, salt and eggs together for 2-3 minutes until pale and fluffy.

• 4

  Slowly add the melted chocolate and butter and continue to whisk until thickened. Lastly, sift in the flour, walnuts and baking powder and fold in gently.

• 5

  Spread batter evenly in prepared pan. Bake on the middle shelf of the oven for 25-30 minutes until a toothpick inserted in centre comes out with a few moist crumbs attached.Cool completely in pan.

• 6

  Serve with a scoop of vanilla ice cream and drizzle chocolate syrup on the top.