Step 1

Prepare the Pan:Line an 8×8-inch baking pan with aluminum foil or parchment paper, allowing it to hang over the edges for easy removal. Lightly grease the foil with non-stick spray.

Step 2

Melt and Mix:In a medium bowl, add the white chocolate chips and set aside.

Step 3

In a microwave-safe bowl, warm the sweetened condensed milk for about 90 seconds to make it easier to mix.

Step 4

Pour the warm condensed milk over the white chocolate chips and let sit for a minute, then stir until smooth.

Step 5

Add Butter and Rum Flavor:Melt the butter in a small dish, then add it and the rum extract to the white chocolate mixture. Stir until fully incorporated and smooth.

Step 6

Mix in ground cinnamon for a hint of spice.

Step 7

Pour and Set:Pour the fudge mixture into the prepared pan, smoothing the top with a spatula. Optionally, sprinkle sanding sugar or crushed butterscotch candy over the top for decoration.

Step 8

Refrigerate for 1-2 hours, or until the fudge is firm.

Step 9

Slice and Serve:Use the foil overhang to lift the fudge from the pan. Transfer to a cutting board and slice into squares.