Preheat the oven to 180°C (356°F).
Cream the butter and sugar until smooth.
Add the egg and mix well.
Sift cake flour, baking powder, and salt together, then mix in.
Add chocolate chips and knead the dough.
Shape the dough into balls and place them on a baking sheet.
Bake for 12-15 minutes in the oven.
Cool on a wire rack.