lightly grease a 9x13 inch pan. Set aside

In heavy 3 quart pan combine butter, sugar, and evaporated milk.

Bring mixture to full boil on medium heat, stirring constantly.

Continue to constantly stir the boiling mixture for five minutes, or until candy thermometer reaches 234°F.

Remove mixture from heat and stir in chocolate chips until melted, then add the marshmallow creme and the vanilla extract.

spread fudge onto your greased pan you set aside earlier and let it cool in the fridge for an hour