Line a square or rectangular container with plastic wrap or parchment paper. Mine was 7 ½" x 9 ½". (The larger the container is, the thinner the fudge will be.)
Place chocolate chunks and sweetened condensed coconut milk in a heatproof bowl over a pan with a couple of inches of water. This will act as a double boiler. (If you have a double boiler use that.)
Heat on low heat until melted.
Add vanilla extract and salt. Mix well.
Fold in walnuts. Allow to cool 5 minutes.
Fold in marshmallows.
Pour into the plastic wrap lined container. Place in the fridge or freezer to set. It will take 2-3 hours to set. Once set, pull out the fudge by the plastic wrap. Remove the plastic wrap and slice on a cutting board.
Store in the fridge or freezer.
Notes
An 11.25-ounce can of Nature's Charm sweetened condensed coconut milk has 1 cup of Sweetened condensed coconut milk in it, so you'll use the whole can.If you use another brand or homemade, make sure to measure 1 cup.This fudge recipe will last up to 2 weeks in the fridge and 2-3 months in the freezer.