Rich, velvety fudge with a smooth, melt-in-your-mouth texture is a classic American confection and beloved family holiday treat. This indulgent candy makes a wonderful homemade gift during the holidays.
Line an 8-inch square baking pan with parchment paper, allowing some overhang for easy removal.
Combine semi-sweet chocolate chips, sweetened condensed milk, and unsalted butter in a medium saucepan.
Set the saucepan over low heat and stir constantly with a rubber spatula until the chocolate and butter are just fully melted and the mixture is silky smooth—make sure not to overheat.
Remove the pan from heat immediately and stir in vanilla extract and a pinch of salt until evenly incorporated.
Pour the fudge mixture into the prepared pan, smoothing the top with a spatula, and let it cool at room temperature for 1 hour before refrigerating for at least 2 hours to set firmly.
Once set, use the parchment overhang to lift the fudge from the pan. Cut into 16 squares and serve at room temperature for best texture.