Pre-heat your oven to 180C. Grease a cookie sheet and line it with baking paper.
Mix all of the ingredients in a bowl, except the walnut and pecan halves, then form the mixture into little round balls, using about 1 tablespoon of mixture per ball.
Place the balls on the lined cookie sheet about 5cm apart and flatten them slightly.
Place a walnut or pecan half on top of each cookie.
Bake in the oven for about 10-12 minutes until golden.
Remove from the oven and cool completely on the cookie sheet.