Step 1

Line a square 9-inch dish with parchment paper. Set aside.

Step 2

In a medium saucepan, heat sugar, butter, and evaporated milk over medium heat until it begins to boil.

Step 3

Continue boiling (a good rolling boil) for a full 5 minutes, stirring constantly.

Step 4

Remove from heat and add chocolate chips and marshmallow cream. Stir until combined. Fold in vanilla and walnuts.

Step 5

Pour mixture into prepared pan. Allow to set one hour.