In a medium-sized mixing bowl, whisk together the flour, baking soda, and salt...
...add the melted butter, granulated sugar, and brown sugar to a large mixing bowl.
Mix on medium-high speed for no less than 2 minutes. Add the eggs and vanilla...
Add the dry ingredient and mix on low until evenly incorporated...
Add M&M candies and the chocolate chips. Mix once more...
Scoop generous tablespoon-sized mounds onto the baking sheet, spacing each cookie about 2" apart, and bake for 10-12 minutes...