Using a microwave-safe bowl put in the white chocolate chips and the sweetened condensed milk.
Put in the microwave and stir after every 30 seconds until all have melted.
Take out of the microwave once melted and in the spices.
Put parchment paper in an 8X8 baking dish and pour the fudge into the pan. Smooth the top of the fudge and add your red and green sprinkles. Put the pan in the fridge for at least 2 hours and then cut into squares.