Aunt June's Unbaked Cookies

Grace and I have no idea who Aunt June is. Grace guesses it came from an office recipe exchange. But when I spent a summer housesitting with my college friend Ellen in Mason, MI, she made these (addictively good) cookies or something very like them pretty frequently.

Mix sugar, milk, butter, cocoa. Boil 1 minute. Add peanut butter and vanilla. Stir until melted. Add oats. Mix. Dump on wax paper.

Source: Grace's recipe file