All the fun in half the time! Valentine Chocolate M&M Sheet Pan Cookies are a mix and bake cookie recipe - no rolling into balls and no baking in batches! Simply press the cookie dough into a sheet pan, bake and slice - perfectly delicious, soft and chewy cookies every time!
Preheat your oven to 350 degrees F. Line a baking sheet with parchment paper and lightly coat with non-stick cooking spray. Set aside.
In a large bowl, beat together the butter and sugar for 3 minutes.
Add the eggs and vanilla and beat for 2 minutes.
Add the flour, baking soda and salt. Beat until just combined.
Add 1 cup of the chocolate chips and 1 cup of the M&Ms. Stir into the cookie batter using a wooden spoon.
Spread the cookie dough as evenly as possible onto the parchment-lined baking sheet. Press the dough out to fill the pan. (Tip: cover the flattened dough with a sheet of parchment paper and use a rolling pin to spread the dough out.) Don't get too worried about the dough being even. It will expand and fill in the gaps during the baking process.
Bake for 15 minutes. Remove from the oven and sprinkle over the remaining chocolate chips and M&Ms, along with the candy sprinkles. Return to the oven and bake for 5-7 more minutes.
Remove from the oven. Allow to cool, undisturbed, for 15 minutes. Carefully slide the giant cookie off the sheet pan and onto a cooling rack to continue cooling.
Once completely cooled, slice into large bars.
Notes
Sheet Pan: I am using a two thirds sheet pan (also referred to as a three quarter size sheet pan) and measures 21" by 15".