Line two small cookie sheets with cooking parchment paper.In a medium saucepan, over medium heat, add the sugar, butter and milk to a rolling boil. Boil 1 minute; remove from heat.
Stir in vanilla and Nutella until creamy and combined. Stir in 2 cups old-fashioned oats until well coated.Drop by 2-tablespoonfuls onto cookie sheets. 8 cookies per sheet. Cool about 15 minutes or until set. Enjoy!