Preheat the oven to 180°C.
Mix the butter and sugar until smooth.
Add the egg and mix well.
Sift in cake flour, baking powder, and salt and mix together.
Add ingredients like chocolate chips and mix evenly.
Scoop the dough into balls and place them on the baking pan.
Bake in the oven for 12-15 minutes.
Let them cool to finish.