Put marshmallows, walnuts, and chocolate chips in a bowl together and set aside. Line a 8x8 pan with foil.

In a largeish pot bring sugar, evaporated milk, butter, and salt to a rolling boil. Boil for 5 min stirring constantly.

Remove from heat and stir in marshmallows, chocolate, walnuts, and vanilla extract. Combine untill marshmallows are melted.

Pour into pan and refrigerate for two hours.