Line an 8x8 pan with parchment paper and spray it lightly with nonstick baking spray.
In a large microwave-safe bowl, combine the sweetened condensed milk and white chocolate. Place it in the microwave and cook for 1 minute.
Stir the mixture together. If the chocolate hasn’t fully melted, microwave it for an additional 30 seconds.
Stir in the vanilla extract and transfer the fudge to the parchment-lined pan.
Spread it out evenly using a spoon or offset spatula.
If you want to decorate your fudge with sprinkles, make sure to add them while the fudge is still soft.
Place the fudge in the fridge to chill for at least 4 hours, or up to overnight.
Remove the white chocolate fudge from the fridge and slice it into your desired size. Serve slightly chilled.
Store any uneaten fudge in the fridge in an airtight container for up to 3 days.
Notes
You must use sweetened condensed milk in this recipe— not evaporated milk!
You can substitute any kind of chocolate— milk and dark are also delicious.
I recommend cutting all the way through the parchment paper and leaving the fudge on small parchment squares— this will prevent it from sticking to your serving platter.
This is a very soft fudge, if you want a fudge that is a little harder (and sturdier), use 5 cups of white chocolate chips instead of the recommended 4.