Preheat the oven to 180 C.
Cream butter and sugars
Beat the egg and add it in to the sugar/butter mix and beat together.
Sift the flour and add to the mixture, mixing well.
Now add the chocolate drops.
Break off small amounts and roll in to a ball shape and place on a lined baking tray some distance apart as the cookies will ‘spread’ when cooked. Then push down flat (clean hands are fine!)
Place in the oven for 7 minutes. Do not wander off as they cook quickly and if you cook them only a minute more they are hard and dry.
When cooked press the tops of the cookies down with a spatula, remove from the grease proof whilst still warm (they stick to the paper when cool) and allow to cool on a wire rack.
Serve with an ice cold glass of milk before going straight to sleep, remembering to keep a couple of the chocolate chip cookies to leave for Santa!