Skip to Content

Chewy M&M Cookie Bars

These Chewy M&M Cookie Bars are the perfect dessert for kids (and adults too)! These bars are a little sweet, chewy, gooey and loaded with M&M’s! My kids had so much fun helping to make these.

Chewy M&M Cookie Bars on a platter

This recipe is easy and does not require too many ingredients, most of which you probably have on hand! Scroll to the bottom for the full recipe. First, in the microwave or on the stove, melt the butter. Then, add in light brown sugar and stir well. Let cool for 5-10 minutes to avoid scrambling the eggs.

Then, add the eggs one at a time being sure to fully incorporate before adding the next. Next, add flour and baking powder; stir to combine. Mix in 1 cup of M&M’s. Pour batter into a greased or parchment lined 9 x 13″ baking pan. Spread into an even layer and top with remaining M&M’s.

Bake at 350 degrees for 25-30 minutes or until toothpick inserted into the center comes out almost clean. These will still be gooey!

Bakers Tip: Use themed M&M’s to make festive Chewy M&M Cookie Bars! For example, use the red white and blue ones for the 4th of July or Memorial Day, spring colors for Easter, red and green for Christmas, etc.

The worst thing after making a beautiful batch of bars or brownies is not being able to cut them!! To get perfectly sliced cookie bars, first let them cool completely in the pan before slicing. If you used parchment paper to line the pan you will be able to pick up the bars out of the pan and slice them on a cutting board. This will allow you to get straight lines easier than cutting inside the pan.

I would highly recommend using parchment if you want perfectly cut bars. Slicing them in the pan is not as easy. Another tip to nice clean slices is to wipe down your knife in between slices. That way there are no crumbs on the top of the bars.

Cookie bars will stay good at room temperature in an airtight container for about 5 days. If you want to freeze them, wrap them in plastic wrap then place in a zip lock bag or airtight container and freeze up to 3 months. Defrost at room temperature before eating.

More Popular Recipes

Chewy M&M Cookie Bars

Crock Pot Chuck Roast with Potatoes

Chewy M&M Cookie Bars

Easy Air Fryer Crispy Parmesan Eggplant Fries

Chewy M&M Cookie Bars

Chicken Broccoli Alfredo Lasagna

Chewy M&M Cookie Bars sliced into small bars

For a behind the scenes look at Return to the Kitchen, be sure to follow us on Instagram, Facebook, YouTube and Pinterest! Also, if you make this recipe or any of our recipes be sure to tag us @returntothekitchen!

Did you enjoy these Chewy M&M Cookie Bars? Be sure to check out our other desserts, including Black Moon Whoopie Pies, Chocolate Pecan Shortbread Thumbprint Cookies, Homemade Slice and Bake Sugar Cookies, Coconut Chocolate Chip Cookies, Ricotta Cookies, Microwave Mint Chocolate Fudge, Pumpkin Cupcakes with Cream Cheese Frosting, Apple Crisp, Butter Cookie Cake with Whipped Cream Cheese Frosting, Buttercream Frosting, Chocolate Pecan Pie, and Apple Pie. If you are looking for holiday cookies, be sure to check out our Christmas Cookie List!

Chewy M&M Cookie Bars

Chewy M&M Cookie Bars

Yield: 32 bars
Prep Time: 20 minutes
Cook Time: 30 minutes
Additional Time: 30 minutes
Total Time: 1 hour 20 minutes

These Chewy M&M Cookie Bars are a little sweet, chewy, gooey and loaded with M&M's!

Ingredients

  • 2/3 cup butter
  • 1 lb light brown sugar
  • 3 eggs
  • 2 2/3 cup flour
  • 2 1/2 tsp baking powder
  • 1 1/2 cup M&M's, divided

Instructions

  1. Preheat oven to 350 degrees.
  2. Spray with non stick spray then line 9 x 13 baking dish with parchment paper.
  3. In the microwave or on the stove, melt butter. Stir in brown sugar and let cool for 5-10 minutes.
  4. Add eggs one at a time being sure to fully incorporate before adding the next.
  5. Add in flour and baking powder and stir to combine.
  6. Add in 1 cup of M&M's. Stir to combine.
  7. Pour batter into prepared baking dish. Spread evenly. Top with remaining 1/2 cup M&M's.
  8. Bake at 350 degrees for 25- 30 minutes or until toothpick inserted into the center comes out almost clean.
  9. Let bars cool completely then slice and serve. **See post/notes for slicing tips!

Notes

How to get perfectly sliced bars: Let them cool completely in the pan before slicing. If you used parchment paper to line the pan you will be able to pick up the bars out of the pan and slice them on a cutting board.

Recommended Products

As an Amazon Associate and member of other affiliate programs, I earn from qualifying purchases.

Nutrition Information:
Yield: 32 Serving Size: 1
Amount Per Serving: Calories: 181Total Fat: 6gSaturated Fat: 4gTrans Fat: 0gUnsaturated Fat: 2gCholesterol: 29mgSodium: 85mgCarbohydrates: 29gFiber: 1gSugar: 20gProtein: 2g

Did you make this recipe?

Please leave a comment on the blog or share a photo on Instagram

Lisa

Sunday 10th of April 2022

I have some in the oven right now. They've puffed up like a cake!! I'm guessing they'll "fall" and that's what makes em chewy.

Melissa Samartino

Sunday 10th of April 2022

Yes! That’s exactly what should happen!! Enjoy them!

Renee

Sunday 10th of April 2022

They are not chewy. They are rather dry.

Melissa Samartino

Sunday 10th of April 2022

I'm sorry to hear they came out dry... how long did you bake them for? What size pan did you use?

Corinne

Sunday 21st of June 2020

If you were to add chocolate chips to this, what amount would you recommend?

Melissa

Sunday 21st of June 2020

You can just do a full swap for the M&M’s or if you want to do both 3/4 cup of each M&M’s and chocolate chips.

Skip to Recipe