Preheat the oven to 350 degree Fahrenheit.
Divide the dough into two equal halves and make six equal sized cookie dough balls from the first half (keep the other half of the cookie dough refrigerated until ready to bake).
Place the six cookie dough balls in a prepared baking sheet lined with parchment paper.
Make sure to leave enough space between the cookie dough balls since the cookies will spread as they bake.
I recommend placing only two cookie balls in the same row to avoid the cookies sticking to each other as they bake.
Place the baking sheet in the preheated oven and bake for about 9 to 10 minutes until the cookies are done and the edges are beginning to turn slightly brown in color.
The m&m cookies tend to melt a bit as they are left in the oven for more than 10 minutes (I do this sometimes!) but they are still very delicious!
Once the cookies are baked, transfer the cookies from the hot oven immediately to avoid further baking.
The cookies will look too soft as soon as they are baked, but they will harden just fine once they are cooled.
Allow the cookies to completely cool down, enjoy with a cup of tea, coffee or milk as you like!
Follow the same above steps for the remaining half of cookie dough as well, to bake the remaining six cookies.