In Medium or Large saucepan combine Milk,butter,brown suga,vanilla over medium heat stir till sugar is melted and looks like caramel, add chocolate or peanut butter which ever one. stir till melted. in mean time still stiring occasionaly. In seperate large bowl put powdered sugar in bowl after everything is all together and melted to desire pour mixture from saucepan into powdered sugar mix till all is combined there will be a few lumps but they will desolve. add nuts if desired. Pour mixture into a cake pan or if u have one a fudge pan even a cookie sheet will work. put in fridge for 1 1/2 hours or until cooled and hardened . cut into 1-2 inch squares. package as desired or serve and enjoy.