I made this chocolate cake by eyeballing the measurements.
Years ago I had a phase where I made chocolate cupcakes quite often, and I learned how I prefer my batter. I've found around 10 minutes is good if you want a gooey cake.
Ingredients are eggs(2-3), sugar(1-1,5dl), baking powder(1teaspoon), flour(2-3dl), vanilla sugar(1teaspoon), cocoa powder(3-4msk), melted butter(100grams).