In a bowl, add the butter and brown sugar and mix until combined
Add the milk and vanilla extract and stir to combine
Now, add your dry ingredients. Flour, baking powder and baking soda. Mix to combine. If batter is too dry add 1 Tbsp of milk
Next, add chocolate chips and mix
Add M&M's and gently fold them in
Form dough into a ball and place it onto a baking sheet
Bake on 350 F for 14-16 minutes or until cookies are golden brown
Place on cooling rack for a few minutes before you enjoy them