Preheat oven to 190°c. In a bowl, mix all dry ingredients.

In a small bowl, cream butters and sugar until smooth. Mix in the egg and vanilla. Add half the dry ingredients and knead adding small amounts of the remaining flour. Roll in balls and place on a baking sheet. Flatten the balls.

Bake for 8-10mins. Let stand on baking sheet for a few minutes before moving to a cooling rack.