In a medium saucepan stir add the sugar, cocoa, butter and milk. Over medium-high heat, bring it to a boil, stirring to help the butter melt. Boiling means that there are bubbles all the way across the top of the liquid. Start your stopwatch now and boil it for exactly 1 minute. Remove from heat and quickly add the peanut butter, vanilla and oatmeal and stir to combine.
Working quickly, drop spoonfuls of the mixture onto a sheet of waxed paper. They will cool and harden within a few minutes. Voila. You're done!
Notes
You need wax paper!
Recipe by StreamingGourmet at http://blog.streaminggourmet.com/2012/04/30/oatmeal-chocolate-peanut-butter-no-bake-cookies/