Preheat the oven to 180°C (356°F).
Cream the butter and sugar together until smooth.
Add the egg and mix well.
Sift together cake flour, baking powder, and salt, then add and mix.
Add chocolate chips to complete the dough.
Shape the dough into balls and place them on a baking pan.
Bake at 180°C (356°F) for 12–15 minutes.
Let cool before serving.