120g melted and cooled butter
1 tablespoon vegetable oil
100g white sugar
50g brown sugar (the darker - the less sweet it will be)
2 large eggs at room temperature
1 teaspoon vanilla extract
65g white flour
50g cocoa
A little bit of salt
Whisk
Big wooden spoon
Bread tray (again - if you are using a regular one, double the amounts!)
Optional: 100g of chocolate (cut into chuncks) or nuts