Preheat your oven to 350

Line a baking sheet with parchment and then butter the parchment and sides of the pan.

In the bowl of an electric stand mixer add the butter and sugars.

Mix with a paddle attachment until well

blended and light and fluffy.

Add in vanilla and eggs, continue mixing until well incorporated.

In a separate bowl combine flour, baking powder, baking soda, and salt, whisk until well incorporated.

Add dry ingredients gradually into the mixer, mixing after each addition.

Add in chocolate chips and one cup of the M&M’s fold in until evenly mixed.

Spread the dough evenly into your prepared pan.

Sprinkle 1 cup of M&M’s across the top of the cookie dough.

Bake for 20-25 minutes or until golden brown.

Allow to cool completely before cutting into 24 squares.

Store in an airtight container