01 -
Crank your oven up to 350°F (175°C) and line a couple of baking trays with parchment paper.
02 -
Grab a medium bowl. Whisk together the salt, baking soda, and flour, then leave it aside for later.
03 -
In a bigger bowl, beat the soft butter, brown sugar, white sugar, and peanut butter until it's a creamy dream.
04 -
Beat in the egg and vanilla until smooth. Slowly stir the flour mix into this until it's just blended.
05 -
Scoop the dough into tablespoon-sized balls, roll them smooth, and spread them out on the lined baking trays. Squish each one gently with a fork to make a criss-cross top.
06 -
Bake the cookies for roughly 10-12 minutes. Let them chill out on the baking tray for 5 minutes before moving them to a cooling rack.
07 -
In a bowl, whip together the peanut butter, powdered sugar, soft butter, and vanilla until it turns smooth and spreadable.
08 -
Once cooled, spread some filling on the flat side of one cookie and stick it to another cookie to make a sandwich.
09 -
Keep these cookie sandwiches in a sealed container at room temperature.