Step 1

Preheat oven to 180 C (350 F) standard / 160 C (320 F) fan-forced. Grease and line an 8 inch square baking tin with baking or parchment paper, ensuring two sides overhang.

Step 2

In a large mixing bowl, add the melted butter and sugar and gently whisk together. Add the vanilla extract and stir.

Step 3

Add the eggs, one at a time, and the egg yolk. Then sift in the cocoa powder and flour. Stir until just combined. Pour the brownie batter in the prepared tin and place in the oven. Bake brownies for approximately 25-30 minutes. Leave to cool completely.

Step 4

To make the peanut butter filling, add the butter, peanut butter and icing sugar to a large mixing bowl. Use an electric to combine until smooth (you could use wooden spoon if you prefer). Spread the peanut butter filling on top of your brownie and smooth the top. Pop back into the fridge.

Step 5

Melt the chocolate in the microwave until smooth. Quickly stir through the rice cereal, then pour the chocolate mixture on top of the peanut butter filling and spread out as best you can. Place in the fridge for at least 2 hours or until firm.