01 - Line two baking sheets with parchment paper or silicone baking mats and set aside.
02 - In a medium saucepan over medium heat, melt the butter. Stir in the sugar and whole milk until well blended.
03 - Bring the mixture to a gentle boil, stirring constantly. Once it reaches a full boil, allow it to cook for exactly 1 minute without stirring.
04 - Remove the saucepan from heat. Immediately add the creamy peanut butter, pure vanilla extract, and a pinch of salt. Stir vigorously until the mixture is completely smooth and homogeneous.
05 - Quickly fold in the quick-cooking oats, stirring until every oat is thoroughly coated and evenly distributed throughout the mixture.
06 - Using a tablespoon or cookie scoop, drop rounded portions of the mixture onto the prepared baking sheets, spacing them about 1 inch apart.
07 - Allow the cookies to cool undisturbed at room temperature for 10 to 15 minutes until fully hardened and set.
08 - Once completely firm, transfer the cookies to an airtight container for storage. They will keep at room temperature for up to one week.