Cream together butter and powdered sugar.
Add sour cream and mix well.
Add milk and vanilla and mix well.
Now add all the dry ingredients and mix to form a very sticky dough.
Cover with cling wrap and refrigerate overnight.
Preheat oven to 200°C.
Take lemon sized balls from the dough, dust with flour and roll into a 15cm long rope.
Shape it into 8 or like a pretzel.
Arrange on a greased baking tray.
Bake for 5-10 minutes.
Cool on wire rack and serve or store in an air tight jar.