1 cup unsalted butter, chopped and at room temperature
2/3 cup brown sugar
2/3 cup caster sugar
1 teaspoon salt
1 teaspoon vanilla extract
2 1/3 cups plain flour
1 1/2 teaspoons baking powder
2 cup chocolate chips
395g can condensed milk
To make the cookie dough mixture, in an electric mixer, combine butter, brown sugar and caster sugar and mix on medium setting until combined and mixture is pale yellow.
While mixer is still going, add eggs, salt and vanilla extract and mix until combined. Turn off mixer.
Add flour and baking soda to mixture and stir to combine. Then add 1 cup of the chocolate chips and mix again.
To make the fudge mixture, in medium saucepan, heat remaining chocolate chips and condensed milk over a medium heat - stirring until chocolate has melted and mixture is combined.
Line a 31cm by 20cm baking tray with baking paper and lightly grease with canola spray.
Layer half the cookie dough mixture into the bottom of the tray, using your fingers to push it into the corners and make it even. Then pour in the chocolate fudge mixture and smooth out with a spatula. Then top with remaining cookie dough mixture - spreading it out with your fingers to create the top layer.
Place in a 175-degree oven for 22-25 minutes until golden brown. Remove from tray and cut into squares.