01 -
Line baking sheets with parchment or set out cupcake liners.
02 -
Combine butter, sugar, cocoa, and milk in a saucepan.
03 -
Heat over medium, stirring until it reaches a full boil.
04 -
Let the mixture boil for 60 seconds without stirring.
05 -
Remove the saucepan from the heat.
06 -
Add vanilla, peanut butter, and oats and stir until well combined.
07 -
Drop by 2 tablespoons onto prepared sheets.
08 -
Let cookies set for 20-30 minutes at room temperature or refrigerate to speed up setting.