Instructions

1. Grease and line an 8-inch square pan with baking or parchment paper, ensuring two sides overhang. Preheat oven to 180 C (350 F) standard / 160 C (320 F) fan-forced.
2. In a large mixing bowl, beat together the butter and sugar with an electric beater until pale and creamy. Add vanilla, egg and egg yolk and beat again until combined.
3. Sift in flour, baking soda and beat until a soft dough forms. Add chocolate chips and gently stir.
4. Divide the dough into two and press half of the cookie dough into the bottom of your pan to form one even layer.
5. To make the chocolate fudge, melt the chocolate chips in the microwave, stirring every 30 seconds, until smooth. Add sweetened condensed milk and stir together until combined. Pour over the bottom layer of cookie dough.
6. Grab the other half of your cookie dough and break it up into pieces and place all over the top of the chocolate fudge. Try to spread it out to completely over the chocolate fudge – don’t worry if there are a few gaps.
7. Pop into the oven for approximately 25-30 minutes or until golden brown on top. Leave to cool for 15 minutes before placing in the fridge for at least 2 hours to set. Cut into small slices and serve.