01 -
Preheat oven to 175°C. Lightly grease a 23 cm pie plate or springform pan to ensure easy release.
02 -
Combine butter and 340 g chocolate chips in a heatproof bowl. Melt using a double boiler or in the microwave at 50% power, stirring every 30 seconds until smooth. Cool mixture slightly.
03 -
In a stand mixer, beat eggs, granulated sugar, and vanilla extract on medium-high speed for approximately 3 minutes until pale and fluffy.
04 -
Add the cooled chocolate-butter mixture to the whipped eggs and sugar. Mix until fully incorporated without overmixing.
05 -
Gently fold in flour, baking powder, and salt until just blended. Stir in the remaining 170 g chocolate chips for even distribution.
06 -
Transfer batter to the prepared pan. Bake for 35–40 minutes, until the centre is puffed and the top is lightly cracked.
07 -
Allow to cool completely in the pan before slicing for clean edges. Serve as is or top with hot fudge as desired.