01 - Line a baking sheet with parchment paper and set aside.
02 - In a medium saucepan over medium heat, combine the sugar, butter, milk, cocoa powder, and salt. Stir constantly until the mixture comes to a full rolling boil.
03 - Allow the mixture to boil for 1 minute, stirring steadily. Remove from heat immediately after 1 minute.
04 - Stir in the peanut butter and vanilla extract until smooth and fully melted.
05 - Fold in the rolled oats until they are evenly coated with the chocolate mixture.
06 - Drop spoonfuls of the mixture onto the prepared baking sheet, shaping into rounds as desired.
07 - Let the cookies cool at room temperature for about 20 minutes, or until fully set and firm.