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Cookie, Dessert  /  February 24, 2020

Chewy M&M Cookie Bars

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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

How to make Chewy M&M Cookie Bars

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. Add eggs one at a time being sure to fully incorporate before adding the 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!

How to cut cookie bars

The worst thing after making a beautiful batch of bars or brownies is not being able to cut them!! 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. I would highly recommend using parchment if you want perfectly cut bars. Slicing them in the pan is not as easy.

  • Lifted out of baking dish by the parchment paper.
    Lifted out of baking dish by the parchment paper.
  • Chewy M&M Cookie Bars
    Sliced on a cutting board for perfectly cut bars.

How to store or freeze cookie 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.

Chewy M&M Cookie Bars sliced into small bars

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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!

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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.

  • Pyrex Glass Mixing Bowl Set (3-Piece)
    Pyrex Glass Mixing Bowl Set (3-Piece)
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

© Melissa
Category: Dessert
Chewy M&M Cookie Bars

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2 comments

  • Corinne
    June 21, 2020

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

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    • Melissa
      June 21, 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.

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