This past week, I volunteered to bring a snack to our weekly childbirth class. While I was tempted to bring something uber-healthy, I noticed in past weeks that sweets tended to be better-received by the crowd than healthy veggie platters and such. Give the people what they want, I thought, so I made these decadent yet easy-to-prepare M&M cookie bars. + I’m sooo glad I did.
While they took mere minutes to prep, they tasted out-of-this-world delicious. They’re rich, fudgy, buttery bars with tons of deliciously melty M&Ms packed into every bite. *swoon* so, if you’re looking for a simple, yet super-tasty dessert to feed a crowd, give these amazing little bars a try!

M&M Cookie Bars
Ingredients
Method
- Preheat the oven to 325 degrees.
- Adjust the oven rack to lower-middle position.
- Grease a 9×13 pan and set aside.
- In a medium sized bowl, whisk together the flour, salt, and baking soda; set aside.
- In a large bowl, beat the butter and sugars until light and fluffy.
- Add the egg, egg yolk, and vanilla and mix well.
- Using a rubber spatula, fold the dry ingredients into the egg mixture until just combined; do not overmix.
- Fold in 1 cup of M&M’s and turn the batter into the prepared pan, smoothing the top with the spatula.
- Sprinkle the remaining M&M’s on top and press in slightly.
- Bake 25-30 minutes, until the top of the bars is light golden brown, slightly firm to the touch, and edges start pulling away from sides of pan.
- Cool completely before cutting.
