Step 1

Butter a square pan and line with parchment paper so it hangs over two of the sides for easy removal. Set aside.

Step 2

In a microwave-safe bowl, add chopped chocolate and sweetened condensed milk. Microwave on high for 1 minute. Remove from the microwave. Let sit for 1 minute, then stir to combine. If needed, heat an additional 30 seconds. Stir until chocolate is completely melted the mixture is smooth.

Step 3

Stir in vanilla extract, sea salt, stir in sprinkles if using. Pour fudge into prepared pan. Sprinkle some more sprinkles on top.

Step 4

Let fudge cool completely before cutting into 1-inch squares. Place it in the refrigerator for 1 hour to speed up the process.

Step 5

Store in an airtight container.