Line an 8×8 pan with parchment and lightly spray with cooking oil.

In a large, microwave-safe bowl, combine chocolate chips and sweetened condensed milk.

Microwave on high for 1 minute.

Remove and stir.

If the mixture is completely melted, fold half of the M&M’s into it and then pour it into the prepared pan. Spread it into an even layer.

If it is not thoroughly melted, return the bowl to the microwave for another 15-20 seconds longer.

Sprinkle the additional candies on the top of the fudge layer – pressing them lightly into the top.

Refrigerate until solid – approx 1 hour before cutting.

Use the parchment to lift out of the pan and cut to your desired size.