Preheat oven to 180

In a bowl mix margarine and sugar and mix till incorporated

Add the egg and mix

Add the peanut butter and add flour little at a time

Add the bicarbonate of soda and using a spatula fold your mix till incorporated

Using a cling foil cover your mix and put it in the fridge for 20 min to harden...

Roll the mix to your desired shape and arrange them to a baking tray with parchment paper and bake