01 -
Let it chill in the pan before you cut, so the slices look great. Eat it plain or drizzle on some hot fudge if you want.
02 -
Move your batter into the greased pan and pop it in the oven. Bake about 35–40 minutes until the middle balloons a little and the top cracks up.
03 -
Fold flour, salt, and baking powder gently into the wet stuff. When that's barely mixed in, toss in the leftover 170 g of chocolate chips and stir so they're even.
04 -
Pour your warm chocolate-and-butter blend into those whipped eggs and sugar. Stir together, but don't go overboard.
05 -
Toss eggs, sugar, and vanilla into a stand mixer. Let it whip on medium-high until it's thick and pale—should take around three minutes.
06 -
Put the butter and 340 g of your chocolate chips in a heatproof bowl. Melt them together slowly with a double boiler or short blasts in the microwave (30 seconds at half power, stirring as you go) until smooth. Let it cool down a bit.
07 -
Heat oven to 175°C. Grease up a 23 cm pie plate or springform pan so nothing sticks.