Using a wooden spoon, cream the butter until soft. Add the sugar and beat together with the spoon until the mixture is light and fluffy.
Add the flour and vanilla extract and stir in until you have a fairly stiff dough. Then stir in the chocolate chips.
If you want to use biscuit cutters, sprinkle a little flour on the worksurface and rolling pin and roll out the dough to about 1cm thick. Cut out the biscuits and put them on baking trays lined with baking parchment. Leave about 3cm gaps between each cookie.
Put the baking trays in the freezer for about 15 minutes. This will help the cookies to keep their shape as they are baking.
Bake for about 15 minutes.
Cool on a wire rack.
Feel free to use more chocolate chips for a more chocolate chip rich cookie. Nutritional information is approximate and a guideline only.