Layer a 8 x 8 inch baking pan with parchment paper and butter the paper. I also left an overhang on wither side for easier lifting of the fudge after it sets.
In a heavy bottom pan, add the chocolate chips and the condensed milk along with butter.
Place it on low heat and let the chocolate melt. Using a spatula keep stirring to evenly melt the chocolate.
Make sure that you keep the heat in low when melting the chocolate.
Once the mixture is smooth, quickly pour it on to the prepared pan and spread it.
Place the M&M candies on top pressing it lightly to set. If preferred, you could also quickly mix the M&M candies into the melted chocolate mixture before pouring it on the pan.to set.
Let the Easy M&M Chocolate Fudge cool down to room temperature.
Cover it loosely with plastic wrap and refrigerate for couple of hours to completely set.
Once the Easy M&M Chocolate Fudge has set, remove it from the pan and cut it into desired size. Use a sharp knife to cut through the fudge.