Melt the butter on medium heat
Add the milk and stir to warm it up
Add the sugar and cocoa, stir until melted
Switch to a whisk and bring the mixture to a boil for 1 minute
Remove from heat and add the vanilla and peanut butter, stir to combine
Add the oats and stir until fully coated
Drop spoonfuls of the mixture onto parchment paper or foil and let set
