Line a 9x13 pan with parchment paper

In a medium pan, melt butter over medium heat and then add sugar and evaporated milk

When the mixture comes to a rolling boil, set a timer for 5 mintues and stir constantly

At the end of 5 minutes, remove from heat

Add salt, maple extract, white chocolate chips and marshmallow creme and stir until melted and creamy

Add walnuts and stir until combined

Pour fudge into the prepared 9x13 pan and refrigerate until the bottom of the pan is cool to the touch

Cut into squares and serve!