First let's combine our sweetened condensed milk and our butter in a large microwave safe bowl. Then let's heat it up in the microwave for 2 to 3 minutes until the butter has melted and the mixture is hot, I usually give it a good stir at the 1 minute mark.
Now let's add our chocolate. This recipe is awesome you can use all semi-sweet chocolate chips if you like, or all milk chocolate, or all dark chocolate, or a combination of all of them, as long as you have around 400 grams total. Place the chocolate in the hot condensed milk and butter mixture, and push it down a little bit with a spoon, then just let it sit for 3 to 4 minutes in the hot liquid.
Next after the chocolate has bathed in the sweetened milk, take a spatula or spoon and start to mix, the chocolate should combine very easy with the liquid. Once all melted and combined, the mixture will resemble a frosting or brownie batter.
Now let's take a 8x11 or 9x9 pan and add some parchment paper to it, I like to spray the bottom of the pan first with kitchen spray, this just helps the parchment paper stick to it. Next pour your chocolate mixture into the pan and smooth it out with your spatula. Then all you need to do is put it in the fridge for 2 to 3 hours until it sets up completely. Simple as that!
Now take the large piece of fudge out of the pan and cut it up however you like. This dessert is fairly rich, so I generally cut mine up into small squares. You can store it back in your same pan and just cover it with plastic wrap, or put it in Tupperware, or create little gift bundles and give it away. :) Enjoy!