1. Line an 8×8 square pan with parchment paper. Tip: Sprinkle a little water on the bottom of the pan to help the parchment lay flat—it works like magic!
2. In a medium saucepan over high heat, combine the sugar, butter, and evaporated milk. Stir slowly with a wooden spoon as the butter melts, making sure to scrape down the sides of the pan while you stir.
3. Bring the mixture to a full rolling boil over medium-high heat, stirring constantly. Once it’s boiling, set a timer for 5 minutes, then lower the heat to medium-low. Keep stirring the whole time—it’s worth the arm workout!
4. After 5 minutes, take the pan off the heat and stir in the chocolate chips until they’re completely melted and smooth.
5. Once smooth, add the marshmallow fluff and stir until fully combined.
6. Mix in the vanilla extract until everything is blended together.
7. Pour the fudge mixture into your prepared 8×8 pan and spread it out evenly to cool and set.

**You can also add optional toppings like sprinkles, crushed candy canes, chopped nuts, mini marshmallows, chocolate drizzle, or crushed cookies for a fun and festive touch!

Let the fudge set completely before cutting into squares and serving. Enjoy!