Making Vampire Fudge is a simple process that yields impressive results. Follow these steps carefully:

1. Prepare the Pan: Line an 8×8-inch baking dish with parchment paper, letting the edges hang over for easy removal.
2. Melt White Chocolate: In a saucepan, combine white chocolate chips and sweetened condensed milk over low heat. Stir frequently until smooth and melted.
3. Add Vanilla: Remove the pan from heat and stir in vanilla extract to enhance the flavor.
4. Add Food Coloring: Divide the mixture into two bowls. In one bowl, add a drop of red food coloring and mix until desired darkness is achieved. In the other bowl, add a drop of black food coloring and mix thoroughly.
5. Layer the Fudge: Pour the red fudge mixture into the prepared baking dish, spreading it evenly. Allow it to cool slightly for about 10 minutes.
6. Add Semi-Sweet Chocolate: While the red layer cools, melt the semi-sweet chocolate chips in a separate saucepan with a little condensed milk.
7. Spread the Dark Layer: Pour the melted semi-sweet chocolate mixture over the slightly cooled red layer and spread it evenly.
8. Create Swirls: Using a knife or toothpick, swirl the top layer gently for a marbled effect.
9. Set Your Fudge: Allow the fudge to cool completely at room temperature, then refrigerate for at least 2 hours until fully set.
10. Decorate: Once fully set, lift the fudge out of the pan. Cut it into bite-sized squares and adorn with graphic decorations like edible vampire teeth or spooky sprinkles.

Now you have a visually striking and delicious Vampire Fudge ready to enjoy!