Preheat the oven to 350°F and line 2 baking sheets with parchment paper or spray with non-stick spray..
Using a mixer, beat the softened butter, egg and vanilla until smooth 1-2 minutes.
Gradually add in the jar ingredients and beat until mixed, dough will be thick.
Using a small or large ice cream scoop or heaping tablespoon, drop the dough onto the prepared baking sheets, 6 to 8 per pan, depending on size you are making.
Small cookies bake 8-10 minutes
Large cookies bake 12-14 minutes.
Let the cookies cool for 5 minutes on the baking sheets, then transfer the cookies to wire racks to cool completely.
Makes 15 - 30 cookies depending on size.
To Package For A Gift
Mix together flour, baking soda and salt and pour into a clean, wide-mouth canning jar, lightly packing the mix down.
Add the brown sugar and sugar in an even layer on top of the flour mixture, lightly packing down.
Next, add chocolate chips, then add the M&M's on top of the chocolate chips.
Seal with the lid.