Here's how I do it.1) 320 g of butter
2) 360 g of chocolate
3) 6 eggs
4) 4 dl sugar
5) 1 spoon vanilla sugar
6) 4 dl flour
7) 1 small spoon salt
8) chocolate chips (about 2 dl)
0) Preparation: oven to 180 C and tin lined with baking paper.
1) I prefer to melt chocolate on a water bath. Just to be sure not to burn it. For that I take a big pot, fill it half with water and put it to boil and put a smaller pot in the water. Then add butter cubes in the small pot, and chocolate pieces on it (it's better in this order to avoid burning the good stuff). Let it melt, stirring every now and again to speed up the process and mix the ingredients. When water steaming, turn cooker off.
2) Whisk eggs, sugar and vanilla in a large pot.
3) Add butter-chocolate (good if a little cooled, otherwise your eggs might turn into something interesting) to whisked eggs and beat to combine.
4) Measure flour and mix salt into it.
5) Sprinkle flour through a sieve into the mixture and beat gently.
6) Add chocolate chips.
7) Scrape to the pan.
8) Bake for about 30 minutes. It's best when still gooey inside. Remember, that it keeps cooking as it cools, so it's ok to take it out when the top is crusty, but inside still dough-like. Unless you need to transport it immediately, in that case I recommend you let it be in the oven a little while longer.
