01 -
Butter an 20 cm x 20 cm baking pan and line with parchment paper, leaving a 5 cm overhang on two opposite sides. In a medium saucepan over medium heat, combine butter, chocolate chips, condensed milk, vanilla extract, and salt. Stir constantly with a rubber spatula until the chocolate melts and the mixture is smooth, about 5 minutes. Pour the mixture into the prepared pan.
02 -
Evenly sprinkle the Christmas sprinkles over the surface. Refrigerate until set, for a minimum of 2 hours and up to 24 hours.
03 -
Run a sharp knife around the edges of the pan. Using the parchment paper overhang, lift the fudge out and transfer to a cutting board. If it resists removal, allow it to rest at room temperature for 5 minutes to soften slightly, then try again. Cut into approximately 4 cm squares.