Line your 9-inch square pan with parchment paper, letting the edges overhang for easy removal.
Set up a double boiler or place a heatproof bowl over a saucepan with simmering water, then add the white chocolate chips and sweetened condensed milk.
Stir gently and constantly as the mixture melts, until it becomes smooth, glossy, and thickens slightly, filling your kitchen with a sweet, chocolaty aroma.
Remove the bowl from heat and stir in the vanilla extract along with a pinch of salt, blending well to deepen the flavor.
Gently fold in the candy corn, mixing just enough to distribute them evenly without breaking the chewy bits.
Pour the mixture into your prepared pan, using a spatula to spread it into an even layer and smooth the surface.
Set the pan aside at room temperature, allowing the fudge to firm up for at least 2 hours, or refrigerate for about 1 hour for quicker setting.
Once fully set and firm to the touch, lift the fudge out of the pan using the parchment overhang.
Place the fudge on a cutting board and use a sharp knife to cut into evenly-sized squares, revealing its smooth, chewy interior dotted with colorful candy corn.
Arrange the squares on a serving plate and enjoy this festive, nostalgic treat that melts in your mouth with every bite.