This is a large batch - three times as large as a regular one. I bake it in a large rectangular pan.
Large batch Kladdkaka
300 g butter, melted
700 ml sugar
150 ml cocoa powder
1 tbsp vanilla sugar
450 ml flour (all-purpose)
1-200 g dark chocolate, finely chopped (depending on what you have and how chocolatey you like your cake)
Crack the eggs into a bit bowl. Add sugar, cocoa powder, vanilla sugar and flour and stir. Add the melted butter. Finally add some chopped dark chocolate, no need for exact measurements here.
I like to use a large rectangular pan but since I hate washing up I always line it with baking paper. Do so, and just pour in the batter.
Bake at 150°C - about 20-25 minutes. It should still be quite gooey but not overly runny.
I prefer to eat this cold, so chill it and serve later on. It keeps well in the fridge, and even better in the freezer. And I always serve it with some whipped cream.