Instructions

1. Preheat oven to 180 C (350 F) standard / 160 C (320 F) fan-forced. Line two baking trays with baking paper.
2. In a large mixing bowl, add the butter and sugar and beat using an electric beater on medium speed for a minute or two until smooth and creamy.
3. Add the vanilla and peanut butter and beat until combined, scraping down the sides of the bowl. Add egg and beat until smooth.
4. Add the flour and baking soda and mix briefly until a soft cookie dough forms. Roll cookie dough, approximately 1.5 tablespoons each, into balls and roll in extra sugar.
5. Place on prepared baking trays, leaving room for the cookies to flatten out. Use a fork to flatten the cookies and create a criss-cross pattern.
6. Place in oven for 10-11 minutes or until golden brown on the edges. Leave to cool for 5-10 minutes before transferring to a wire rack to cool completely.