Cream together the butter, sugar and brown sugar until light and fluffy.
Blend in peanut butter & vanilla, followed by the egg.
In a separate bowl, mix the flour, baking powder, and salt.
Blend it into the peanut butter mixture. Mix until smooth.
Shape into a log and chill until firm 30 minutes – 1 hour.
Pre-heat oven 350f/180cLine cookie sheet(s) with parchment paper or nonstick foil
Cut into ¼ inch/5mm thick slices and arrange on a prepared cookie sheet and Flatten the slices with a fork, making a crosshatch pattern on the cookies.
Bake for about 9-12 minutes (until golden).
Let cool for 5 minutes before transferring to a wire rack and leave to cool before eating.
Video
Notes
For a gooier cookie, you can add an extra egg.
Add a tablespoon of golden syrup and an extra depth of flavor.
Over-mixing may result in tough cookies. Mix dough only until ingredients are just combined.
When making the crisscross pattern, to keep the fork from sticking, dip it in warm water or flour. Alternatively, you can coat the disks of dough with cooking spray before pressing with the fork.