Preheat the oven to 180°C (356°F).
Mix the butter and sugar until creamy.
Add the egg and mix well.
Add cake flour, baking powder, and salt and mix thoroughly.
Add the chocolate chips and knead the dough.
Shape the dough into rounds and place them on a baking tray.
Bake in the oven for 15–20 minutes.
Let cool and serve.