Mix the flour, rolled oats, baking powder, margarine and sugar together until the mixture resembles crumbs. Add the syrup, vanilla and continue mixing until the ingredients come together as a stiff dough.
Turn the mixture out onto a floured surface, form into a roll approximately 9cm (3.5in) in diameter and slice into eight.
Place the cookies onto a greased tray and bake in the preheated oven for 20-30 minutes until pale brown. Do not overcook.