Fast, simple, and easy – just the way Christmas baking should be! Sheet Pan M&M Chocolate Holiday Bars are festive, fun, and family-friendly! Baking cookies in a sheet pan like this, is much faster than baking one tray at a time!
Preheat the oven to 350 degrees. Line a baking sheet with parchment paper and lightly coat with non-stick cooking spray. Set aside.
In large bowl, use a hand-held mixer to 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. 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 oven. Sprinkle over the remaining chocolate chips and M&Ms, along with the candy sprinkles. Return to over and bake for 5 more minutes.
Remove from oven. Allow to cool, undisturbed, for 15 minutes. Carefully slide the giant cookie off of 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".