Make rich, dense fudge squares featuring chocolate and bright pistachio flavors without using your oven. This simple recipe sets up in the refrigerator.
Line an 8×8 inch baking pan with parchment paper, leaving an overhang on two sides for easy removal. Lightly grease the paper.
In a medium saucepan over low heat, combine the sweetened condensed milk, chocolate chips, and butter. Stir constantly until the chocolate and butter are completely melted and the mixture is smooth. Do not let it boil.
Remove the saucepan from the heat. Stir in the vanilla extract and salt until combined.
Fold in 1 cup of the chopped pistachios into the chocolate mixture.
Pour the fudge mixture into the prepared pan and spread it evenly.
Sprinkle the remaining 1/2 cup of chopped pistachios over the top of the fudge layer. Gently press them into the surface.
Refrigerate the pan for at least 4 hours, or until the fudge is firm enough to cut.
Use the parchment overhang to lift the fudge block from the pan. Place it on a cutting board.
Cut the fudge into 16 squares. Dust with powdered sugar before serving, if desired.
Notes
For an extra smooth texture, use high-quality chocolate chips or chopped baking chocolate.
If you prefer a stronger pistachio flavor, you can add 1/4 teaspoon of pure pistachio extract to the melted chocolate mixture.
Store leftovers in an airtight container in the refrigerator for up to one week.