Prepare an 8×8-inch square baking dish by lining it with parchment paper, allowing some overhang on the sides for easy removal later.

In a large mixing bowl, combine the milk chocolate chips and sweetened condensed milk.

Heat the mixture in a microwave-safe bowl starting with 30 seconds on high power, and then heat in 15-second intervals until completely melted and smooth, stirring after each interval.

Once melted and smooth, stir in the vanilla extract and a pinch of salt until well combined.

Gently fold in the chopped Cadbury Crème Eggs and mini marshmallows. If using, fold in the crushed graham crackers for added texture.

Pour the fudge mixture into the prepared baking dish and use a spatula to spread it evenly.

Cover the dish with plastic wrap or aluminum foil and refrigerate for at least 2-3 hours until set.

Remove the fudge from the refrigerator and lift it out using the parchment paper.

Cut the fudge into squares or rectangles for serving.