Line an 8x8 pan with parchment paper and leave overhang on two sides.

Add the white chocolate chips, sweetened condensed milk, and butter to a medium saucepan.

Warm over low heat while stirring until the mixture is smooth and fully melted.

Remove the saucepan from the heat.

Stir in the vanilla extract and a pinch of salt.

Pour the fudge mixture into the lined pan and spread it into an even layer.

Place one small dot of red gel food coloring and one small dot of green gel food coloring on the surface of the fudge.

Drag a toothpick or skewer through the color dots to create soft top-surface marbling.

Tap the pan gently on the counter to settle the mixture.

Refrigerate the fudge for at least 3 hours or until fully firm.

Lift the fudge from the pan using the parchment overhang.

Cut the chilled fudge into neat one-inch cubes using a warm knife.

Drizzle thin lines of melted white chocolate across the tops of the cubes to resemble ribbon.

Add a tiny dot of white chocolate or a small white pearl candy to the center to create a simple bow.

Let the decorations set completely before serving or packaging.