Prepare Ingredients: Measure all ingredients before starting.
Melt Butter and Sugar: In a medium saucepan, combine butter, sugar, and milk. Heat over medium, stirring occasionally, until it reaches a rolling boil.
Boil for 60 Seconds: Once boiling, let it cook for exactly 60 seconds. This ensures the cookies set properly.
Add Peanut Butter and Vanilla: Remove the saucepan from heat and stir in peanut butter and vanilla extract until smooth.
Mix in Oats: Add quick oats and stir thoroughly to coat evenly.
Scoop Onto Parchment Paper: Use a spoon to drop small mounds of the mixture onto parchment paper. Flatten slightly if desired.
Let Set: Allow cookies to cool at room temperature for 30 minutes or refrigerate for faster setting.
Enjoy: Once firm, your no-bake peanut butter cookies are ready to enjoy!