Sift the flour and salt in a bowl.

Combine the butter, peanut butter and sugars in a bowl and mix on medium speed for 3 minutes.

Stir in the egg and vanilla and mix for another 2 minutes.

Add the flour and mix just until combined.

Spoon the batter on a pastry bag fitted with a star tip then pipe small dollops of batter on baking trays lined with parchment paper.

Freeze the piped cookies for 15 minutes then bake in the preheated oven at 350F - 180C for 10 minutes or until the edges begin to turn just slightly golden brown.

Once baked, remove from the oven and allow them to cool down in the pan.

When chilled, you can dip them into melted chocolate partially and roll them through chopped peanuts.