In a medium sized heavy saucepan bring to a boil, the sugar, cocoa, butter and milk.
Let boil for 1-2 minutes, stirring constantly but be careful not to burn it.
Add the peanut butter and vanilla mix until combined.
Add the peanuts and oatmeal to the pan and mix together till completely coated in chocolate. (Add oatmeal if necessary.)
On a rimmed cookie sheet covered with waxed paper, drop mixture by the medium cookie scoop size, allow to cool ( I usually throw mine in the fridge!).