01 - Line two baking sheets with parchment paper and set aside.
02 - In a medium saucepan over medium heat, combine the butter, sugar, milk, and cocoa powder. Stir frequently until the butter melts and the mixture is smooth.
03 - Bring the mixture to a rolling boil, stirring constantly. Allow it to boil for exactly 1 minute to ensure proper setting.
04 - Remove the saucepan from heat. Immediately stir in the peanut butter, vanilla extract, and a pinch of salt until completely smooth and well blended.
05 - Add the quick-cooking oats to the mixture and stir thoroughly until every oat is fully coated with the chocolate mixture.
06 - Using a tablespoon or cookie scoop, drop spoonfuls of the mixture onto the prepared baking sheets. Gently shape into rounds if desired.
07 - Let the cookies cool at room temperature for 15 to 20 minutes until firm. For faster setting, place the baking sheets in the refrigerator.