Prepare Your Work Area:

Line a baking sheet with parchment paper or a silicone mat to prevent sticking.

Make the Chocolate Mixture:

In a medium saucepan, combine the butter, sugar, cocoa powder, milk, and a pinch of salt. Heat over medium heat, stirring constantly, until the mixture comes to a rolling boil. Let it boil for 1 minute while continuing to stir.

Add Peanut Butter and Vanilla:

Remove the saucepan from heat. Stir in the peanut butter and vanilla extract until fully melted and smooth.

Combine with Oats:

Add the quick oats to the saucepan and mix thoroughly until the oats are evenly coated with the chocolate mixture.

Shape the Cookies:

Using a spoon or cookie scoop, drop spoonfuls of the mixture onto the prepared baking sheet. Flatten slightly with the back of the spoon if desired.

Set the Cookies:

Allow the cookies to cool and set at room temperature for about 30 minutes, or place them in the refrigerator for faster setting.