Directions:

Prep the Pan: Line an 8×8-inch baking dish with parchment paper or lightly grease it. Set aside.
Melt the Chocolate: In a medium saucepan over low heat, melt the chocolate chips, sweetened condensed milk, and butter. Stir constantly until smooth.
Add Flavor: Remove from heat and stir in the vanilla extract. Fold in chopped walnuts if using.
Set the Fudge: Pour into the prepared dish, smoothing the top.

Chill: Refrigerate for at least 2 hours until firm.
Cut & Serve: Slice into squares and enjoy this rich, creamy treat!
Prep Time: 10 min | Cook Time: 5 min | Total Time: 2 hr 15 min