In a medium sized sauce pan over medium high heat, add butter, sugar, cocoa powder, milk and salt. Stir until butter is melted and ingredients are incorporated. Bring to a boil and boil for 1 1/2 -2 minutes (not any longer), stirring constantly.

Remove from heat and stir in peanut butter until completely melted. Add vanilla and oatmeal; mix well. Now working quickly before it cools to much, drop by tablespoon full onto waxed paper. Let cool completely on waxed paper. Remove the cookies when they have set up.