All you have to do is:
preheat oven to 180° C
mix 100 gram butter,
50 gram sugar,
15 gram baking powder
300 gram flour
a pinch of salt
until they resemble bread crumbs.
add aprox 150 ml milk very carefully not to stir too much, just combine wet and dry
put the mixture on a greased tray
form a flat circle and cut into a cake of eight pieces.
bake until surface gets slighly brown.
Cut open while still hot and enjoy with melting butter.