Put sugar, milk, cocoa powder, butter & vanilla extract in a large pot then cook over medium heat until the mix is well blended & has become smooth

Remove the pot from heat. Add in the oatmeal & the peanut butter then mix thoroughly to a thick consistency.

Spoon the cookies out on onto parchment or wax paper (one spoonful or so per cookie) & let them set & harden for 30 mins or so. Then eat & enjoy.