Start the oven at 175 degrees Celsius.
Let the margarine get room temperature, and mix with it the sugar, vanilla sugar, the syrup, flour, cardamom and the baking powder.
Divide the dough in two and firm two long rolls.
Place the rolls on a baking sheet, and flatten them out.
Place the baking sheet in the middle of the oven for fifteen minutes. Take them out from the oven and cut the cookies diagonally.