Beat sugar, brown sugar, and butter until light and creamy with an electric mixer.

Add the eggs one at a time - beat well between each egg.

Mix flour, baking powder, salt, and vanilla sugar together in a bowl. 

Sift the flour mixture into the butter-egg mixture. Stir the dough together with a spoon or mix at the lowest speed. Stop when the dough is combined, and the ingredients are mixed. Do not stir for too long, as your cookies' texture will be incorrect.

Chop chocolate into large pieces the size of hazelnuts. Add it to the dough.

Using 2 tablespoons, place the dough in dollops on baking sheets with parchment paper. Remember to leave space between each cookie as they will spread. 

Let the cookies cool on a wire rack