01 -
Line an 8-inch square pan with parchment paper, leaving overhang on two sides for lifting. Lightly grease the parchment if it is not nonstick.
02 -
Add the white chocolate chips, sweetened condensed milk, and butter to a medium saucepan. Warm over low heat, stirring often, until the mixture is smooth and glossy, about 4-5 minutes.
03 -
Remove the pan from the heat. Stir in the vanilla, salt, orange zest if using, and 3/4 cup of the dried cranberries.
04 -
Scrape the fudge into the prepared pan and smooth the top with a spatula. Sprinkle the remaining 1/4 cup dried cranberries over the top and press them in gently.
05 -
Refrigerate for at least 2 hours, until firm enough to lift and slice. For a faster set, chill 45 minutes in the refrigerator, then 20 minutes in the freezer.
06 -
Lift the fudge out of the pan. Cut into 49 small squares with a sharp knife, wiping the blade between cuts for neat edges.