1. Preheat the oven to 390°F (200°C). Line a baking sheet with baking parchment and set aside.

2. Add the butter and brown sugar to a large bowl and mix on high speed until light and fluffy. Mix the flour with baking powder and ground ginger, add to the bowl and knead briefly until you get a smooth dough. Shape into walnut-sized balls and place with some space in between on the baking sheet. Use a fork and press lines into the dough balls, bake for about 12 minutes until only lightly browned. Take out of the oven and let cool down completely on a wire rack. Repeat with the remaining dough. Store the cookies in a tin box without other cookies.