Mix the butter, brown sugar, white sugar, vanilla sugar and salt. Whisk in the egg. Combine flour and baking powder first and then mix in the mixture by two halfs. Fold in the chocolate chips and let the dough chill for 30 min.
Now take a big spoon of dough and roll it to a ball. Place app. 9 cookie dough balls on a prepared baking tray (to have enough space when they spread out). Bake them for 12 to 15 minutes at 180 °C top and bottom heat.
Afterwards let them cool down and enjoy your Chocolate Chip Cookies with a glass of cold milk or a hot cup of coffee or a tasty cup of tea or... or ... or ;)