Preheat the oven to 180C, Gas Mark 4

Cream together the butter and sugar until soft and fluffy.

Add the egg, flour, peanut butter and baking powder and mix into a dough.

Add the peanuts and mix though

Put some baking parchment on a baking tray.

Roll the dough into small balls and place on the baking tray.

Press with a fork

Bake for 25 minutes until golden