At this point, you’ll want to add in your pistachio pudding mix, and keep that stirring going, until the contents of the saucepan take on a super-smooth consistency.
When you’re happy with how that’s looking, remove the saucepan from the heat source, before stirring in your vanilla extract (and food coloring, should you decide to use it).
Following that, grab your marshmallow fluff, and fold it in amongst the contents, in addition to half of your chopped pistachios.
Upon completing that step, you will then want to pour that prepared fudge into your parchment-paper-lined pan.
On top of that, sprinkle the remainder of your pistachios, for a little added crunch (and flair).
Now, you’ll want the fudge to set in a cool place (preferably the fridge) for a decent amount of time to harden.
Once it reaches your desired consistency, you can chop the fudge into little pieces, and enjoy!
Be sure to remember to store the rest in an airtight container for future snacking, but other than that, you’re done.