• Cream the butter or margarine and sugar together in a mixing bowl until light and creamy.
• Stir in the beaten egg, mixing well to blend, then stir in the peanut butter.
• Sift in the dry ingredients, mixing well.
• Stir in the vanilla essence.
• Knead the mixture slightly to form a smooth, stiff dough, then roll small pieces of the dough into balls.
• Place the balls on a greased baking paper and press them flat with a fork.
• Bake in the oven at 180ºC (350ºF) until firm, about 15 minutes.
• Allow to cool slightly in the pan, then transfer to a wire rack to cool completely.
• Store in airtight containers.

Note

• Place the biscuits well apart on the baking paper to allow for expansion during baking.