1. Prepare the pan:

• Line an 8×8-inch (20×20 cm) baking pan with parchment paper, leaving an overhang for easy removal. Set aside.

2. Melt the fudge base:

• In a medium saucepan, combine the white chocolate chips and sweetened condensed milk. Heat over low heat, stirring constantly, until the chocolate is melted and the mixture is smooth. Remove from heat and stir in the vanilla extract.

3. Divide and color the fudge:

• Divide the mixture evenly into three bowls. Leave one portion white, tint one portion red, and tint the other green using gel food coloring. Stir until the colors are evenly mixed.

4. Layer and swirl the fudge:

• Drop spoonfuls of each color into the prepared pan, alternating between red, green, and white. Use a toothpick or skewer to gently swirl the colors together for a marbled effect.

5. Add sprinkles:

• Sprinkle holiday-themed sprinkles over the top of the fudge while it’s still warm. Press lightly to ensure they stick.

6. Chill and set:

• Refrigerate the fudge for at least 2 hours, or until it is firm enough to cut.

7. Cut and serve:

• Use the parchment overhang to lift the fudge out of the pan. Cut into small squares or rectangles and serve.