01 - Line two baking sheets with parchment paper or silicone baking mats.
02 - In a medium saucepan over medium heat, melt the butter. Stir in the sugar and whole milk until evenly combined.
03 - Bring the mixture to a gentle boil, stirring constantly. Once it reaches a full boil, stop stirring and let it cook for exactly 1 minute.
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 uniform.
05 - Quickly fold in the quick-cooking oats, stirring until every oat is thoroughly coated and well combined. Work swiftly before the mixture begins to set.
06 - Using a tablespoon or a small cookie scoop, drop generous 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 the cookies have fully set, transfer them to an airtight container for storage. They will keep at room temperature for up to one week.