Cream the butter and sugar together.
Add the egg and mix well.
Sift in cake flour, cocoa powder, and baking powder, then add to the mixture.
Add almond slices and chocolate chips, then knead the dough.
Divide the dough into bite-sized pieces and roll them into balls.
Line a baking tray with parchment paper and place the dough balls on it.
Bake in a preheated oven at 180°C for 15 minutes.
Let them cool to finish.