Preheat the oven to 180°C (356°F).
Cream the butter and sugar until smooth.
Add the egg and mix again.
Sift cake flour, baking powder, and salt into the mixture and combine.
Add milk and desired mix-ins (chocolate, nuts, etc.) and mix until evenly incorporated.
Form the dough into scone shapes.
Place the shaped dough onto a baking pan lined with parchment paper.
Bake in the oven at 180°C (356°F) for 18–20 minutes.
Let cool, then enjoy.