Cookie dough: In a bowl, cream the butter, and both the sugars together until light and fluffy. 2-3 minutes approx.
Add the vanilla, the egg and mix until combined.
Sift the flour, salt and baking powder into the bowl and mix together to create a smooth dough. Then add your choice of chopped chocolate or chips. I usually reserve a few pieces of chopped chocolate for decorating the tops after removing them from the oven.
Preheat the oven to 200°C / 180°C fan / 400°F / Gas 6 and line 2-3 baking trays with baking/parchment paper.
Shaping: Using a 2 tbsp ice cream scoop or a large spoon, scoop out 8 balls of cookie dough onto your prepared trays. I place 3-4 cookie balls per per tray and slightly push down on the balls to flatten them out.
Resting the dough: is completely optional and does have some advantages, read the tips section on the blog post for more details. Freezing the dough: At this stage the dough can also be frozen for baking another day.
Baking: Place the trays on the preheated oven for 10-12 minutes, until browned around the edges. Once baked and while they are still hot I like to decorate the tops of the cookies with a few extra pieces of chopped chocolate and also bang the baking tray on the work top to help flatten out the cookies evenly.
Let them rest on the baking tray for 5 minutes before transferring to a wire rack to cool.