Line two baking sheets with parchment paper or set out approximately 29 cupcake liners.

In a 2.5 to 3 quart medium saucepan combine butter, sugar, cocoa, and milk.

Set over medium heat, and cook stirring frequently until it reaches a full boil.

Allow mixture to boil 60 seconds without stirring.

Remove from heat, immediately add in vanilla, peanut butter and quick oats.

Stir mixture until well combined then, using a medium (2 Tbsp) cookie scoop or two spoons drop mixture onto lined baking sheets or into cupcake liners.

Allow to rest at room temperature until set, about 20 - 30 minutes (to speed up setting refrigerate).

Store cookies in an airtight container at room temperature.