In large saucepan mix up sugar, milk, butter & cocoa and bring it up to a boil for 3-4 minutes. Remove from heat and in peanut butter and vanilla and stir quickly until well blended. Then add in your oats and mix it all up.
Drop onto wax paper with a spoon in size cookie desired (remember that cookie will spread out some).
Let cool for abouit 1/2 hour or until cooled and enjoy