Combine sugar, butter, cocoa and milk in a saucepan. Bring to a boil over medium heat and boil for 2 minutes. Remove from heat and stir in the peanut butter until melted. Mix in oats and vanilla and stir until coated with cocoa mixture. Drop by teaspoonfuls onto wax paper and let cool. 

Serve : 8 dozen cookies

Ready in : 20 minutes