First you'll want to preheat your oven to 375 line a baking sheet with parchment paper.
In a large mixing bowl combine brownie mix and flour. Stir until the flour is well incorporated.
Add in eggs, 1 tablespoon of water and melted butter, mix until well blended. This creates a thick dough, you can add another tablespoon of water a little at a time if the dough is too dry.
Next fold in the chocolate chips and ¾ cup of the M&M’s until well mixed.
Scoop out dough 1 tablespoon at a time, roll into a ball and place on prepared cookie sheet. Space your balls of dough about 2 inches apart.
Place in the oven and bake 10-13 minutes or until the top is cracked and appears dry.
Remove from the oven and immediately press the extra M&M’s into the tops of the cookies.
Allow to cool on the baking sheet for about 3 minutes and then move to a cooling rack to cool completely.