First, line a baking tray with baking paper and preheat the oven to 180° C top/bottom heat (375° F, 160 °C convection).
In a mixing bowl, beat the butter at room temperature, the syrup and the spices with a hand mixer until creamy. Mix the flour and baking powder in another bowl, add them gradually to the butter and syrup mixture and work all the ingredients into a smooth dough using the dough hook of a mixer.
On a floured work surface, shape the dough into rolls, each about the diameter of a coin. Cut the rolls into 3 to 4 mm thin slices with a knife.
Place the ginger biscuits on the prepared baking tray with enough space between them to allow them to rise during baking.
Bake them for 8 minutes.
Then take them out of the oven and place them on a cooling rack to cool.