Margaret

Let the butter soften at room temperature.

Mix the sugar and softened butter together.

Beat the egg and mix it well into the butter mixture.

Sift in cake flour and baking powder, then knead the dough.

Add peanut powder and mix well.

Shape the dough into balls and place them on a baking pan.

Bake in a 180°C oven for 13 to 15 minutes.