These thick and chewy M&M Christmas Cookie Bars are perfect for your holiday cookie exchange and holiday get togethers! These easy cookie bars are packed with red and green M&M's and chocolate chips in every bite.
Preheat oven to 350ºF and line a 9x13 baking dish with parchment paper.
In a large bowl mix together melted butter, brown sugar and vanilla. Then add in eggs and stir until batter is like a thick caramel.
In a separate bowl, whisk together flour, baking soda and salt. Then pour flour into batter, roughly a ½ cup at a time, folding batter over itself to smooth any ribbons of flour into the batter. The batter will be very thick.
Add in red and green M&M's and chocolate chips to batter and gently combine.
Pour into baking pan and spread evenly. Top with additional M&M's and chocolate chips if desired. Bake at 350ºF for 26 minutes.
Remove parchment paper from pan and set on a cooling rack to cool.
Use a knife or bench scraper to divide into 24 squares.
Notes
The cookie bars will be golden brown and firm, but soft and gooey on the inside. You can use a toothpick to see if the cookie bars are completely cooked. A little under done just makes these cookies extra soft and chewy.