Chocolate (No Bake) Oatmeal Cookies

1. Stir the butter, sugar, cocoa, and milk together in a saucepan, and cook on medium heat until it boils. Boil for about 3 minutes. 2. Remove from heat and add the oats, peanut butter, and vanilla. Stir until thoroughly mixed. 3. Drop by spoonful onto waxed paper, and allow the cookies to cool and harden slightly, which takes about 20 minutes.