Chocolate biscuit slice

• Ingredients

• 125g butter, chopped
• 1/2 cup caster sugar
• 1 teaspoon vanilla essence
• 1 1/2 tablespoons cocoa powder
• 1 egg, lightly beaten
• 250g packet arrowroot biscuits, roughly chopped
• 1 tablespoon desiccated coconut

• 2 cups pure icing sugar
• 1/4 cup cocoa powder
• 40g butter, melted
• 2 tablespoons boiling water

• Method

1. Step 1
   Grease and line a 3cm-deep, 16.5cm x 26cm (base) slab pan with baking paper, allowing a 2cm overhang at both long ends. Place butter, sugar, vanilla and cocoa in a saucepan over medium-low heat. Cook, stirring occasionally, for 3 to 4 minutes or until butter melts. Set aside for 5 minutes to cool.
2. Step 2
   Add egg to chocolate mixture and whisk to combine. Place saucepan over low heat. Cook, whisking constantly, for 10 minutes or until mixture is thick, glossy and smooth. Transfer to a large bowl.
3. Step 3
   Add biscuits and stir to combine. Spoon into prepared pan. Smooth surface. Cover and refrigerate for 2 to 3 hours or until set.
4. Step 4
   Make chocolate icing: Sift icing sugar and cocoa together into a bowl. Add butter and boiling water. Stir until smooth. Spread icing over slice. Sprinkle with coconut. Allow icing to set. Slice and serve.