Cookies

M&M Cookie bars

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M&M Cookie Bars are an easy treat that the kids can help with! They can be dressed up for any season by buying a seasonal package of M&Ms. These was have green mint flavored M&M’s for St. Patrick’s Day!

M&M cookie bars cut into pieces, stacked on bamboo board.Pin

These Cookie Bars are easy and fun to make for just about any holiday! Now they have M&M’s specially packaged for Valentines Day, St. Patty’s Day, Easter, Halloween, and Christmas, at the very least. There are probably a few others that I missed! You could just do them for a fun weekend project any time of the year with regular, multi-colored M&M’s!

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What are cookie bars?

Close up of cookie bars in pan.Pin

Cookie Bars is a general term in the world of cookies that refers to any cookie cooked in a large pan and then cut into “bars” or squares. Cookie Bars can be made in a endless variety of variations!

A Bit of History on the M&M’s

two cookie bars on white plate with milkPin

Sometimes the history of a specfic food, or it’s origins really fascinate me! For instance, M&M’s were first manufactured in 1941. The idea for the M&M’s occured during a trip to Europe when Forrest Mars observed British troops eating British Smarties, which were milk chocolate, coated in a hardened sugar coating, so that the chocolate did not melt.

Two wooden boards with cliced cookie barsPin

M&M’s stood for the business partership between Forrest Mars and William Murrie, son of the Hershey’s chocolate president. The deal they struck allowed them to use Hershey’s chocolate, who had control of the rationed chocolate. (Chocolate was rationed during the war for the troops) The success of the chocolate is directly attributed to the second world war, when the United States Government was the companies’ biggest customer!

Can Cookie Bars be Frozen?

M&M cookie bars in glass baking panPin

Yes. Cookie Bars can be wrapped in an airtight plastic wrap, or a container and frozen for several months.

How to make M&M cookie bars

  1. Line baking pan with parchment paper. Preheat oven to 350°F.
  2. Measure dry ingredients in bowl.
  3. Break 2 room temperature eggs.
  4. Two sticks of butter in mixing bowl.
  5. Cream until smooth and light colored.
  6. Add sugars and cream until light colored.
Parchment lined baking pan. Dry ingredients in bowl. Eggs in small bowl. Butter placed in mixing bowl.Pin
  1. Add eggs. Combine.
  2. Add vanilla. Combine.
  3. Mix dry ingredients in, in 3 additions, just until mixed.
  4. Add in chopped nuts by hand.
Eggs added to butter mixture. Vanilla added to butter. Dry ingredients incorporated into wet. Chopped nuts on cutting board.Pin
raw cookie bars in baking pan topped with M&M'sPin

Spread out the dough evenly on the parchment paper. Add M&M’s to the top. Bake at 350°F for 20-25 minutes, until browned and tester inserted in the center comes out clean.

When to cut cookie bars

Whole cookie bars, before cutting on parchment paperPin

These M&M’s Cookie Bars should be cooled for 30- 1 hour, before cutting, depending on the air temperature. They should not be totaly cooled. They slice more uniform if the chocolate is just a bit gooey in the center still. Use a very sharp knife to cut through the M&M’s.

Cookie bars on 2 wooden boardsPin

That’s how easy it is to make these M&M’s Cookie Bars! I hope you like the recipe today!

Some other delicious cookies

Tools I use

2 cookie bars on white platePin

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M&M cookie bars stacked on wooden board.Pin

M&M Cookie Bars

M&M Cookie Bars are an easy treat that the kids can help with! M&M Cookie Bars can be dressed up for any season by buying a seasonal package of M&M’s
See Step by Step Photos Above!Most of our recipes have step by step photos and videos! Also helpful tips so that you can make it perfectly the first time and every time! Scroll up to see them!
5 from 8 votes
Print Pin Rate
Course: Dessert
Cuisine: American
Prep Time: 10 minutes
Cook Time: 20 minutes
Cooling: 1 hour
Total Time: 30 minutes
Servings: 24 bars
Calories: 251kcal
Author: Beth Neels
Cost: $5

Ingredients

Instructions

  • Measure and combine dry ingredients in bowl.
  • Cream butter with electric mixer until creamy and light.
  • Add sugars and cream again, until light in color.
  • Add eggs. Combine.
  • Add vanilla. Combine.
  • Incorporate flour in 3 additions, just until combined in between additions.
  • Stir in chopped nuts by hand.
  • Evenly spread dough into parchment paper lined 9″x13″ pan. Top with M&M’s
  • If most of the M&M’s sink into dough, garnish with additional candies right after they come out of the oven.
  • Cool until almost completely cool. Then cut with a very sharp knife into bars or squares.
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Video

Notes

Customize cookie bars for holiday with holiday colored M&Ms.
General Baking Tips:
Always measure dry ingredients with a dry measuring cup. Measure with dry measuring cups or weigh dry ingredients.
Always measure liquid ingredients with liquid measuring cup
Never break eggs directly into recipe ingredients. Break eggs into a separate bowl, in case you get any shells, so that you can pull them out.
Make sure that you know what temperature your oven is set at. Buy an oven thermometer and check oven temperature regularly.
Always check baked goods, like cakes or quick breads with cake tester, placed in center. If the tester comes out clean, it’s done.

Nutrition

Calories: 251kcal | Carbohydrates: 31g | Protein: 2g | Fat: 13g | Saturated Fat: 7g | Cholesterol: 35mg | Sodium: 137mg | Potassium: 64mg | Sugar: 21g | Vitamin A: 285IU | Vitamin C: 0.1mg | Calcium: 40mg | Iron: 0.9mg
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20 Comments

  1. 5 stars
    A perfect activity to get my kids involved with this weekend. They were saying they love to bake some cookies and these look perfect and fit for St Patrick’s day.
    Thank you so much for this inspiring recipe Beth.

    1. These are so easy for them help with too, Ramona! Thanks so much for stopping by! Happy St. Patrick’s Day!

  2. 5 stars
    My daughter is the baker in our house… I’m going to pick up a bag of green M&M’s today so she can make these for our St. Patty’s Day celebration tomorrow! Interesting story about the origin of M&M’s… you learn a new thing every day. 🙂

    1. I find the history foods fascinating! Let me know what your daughter thinks! Thank you Susan! Happy St. Patrick’s Day!

  3. Who would say no these yummy and tasty m&m cookie bars, such straightforward recipe and a perfect treat for a St. Patrick day

  4. 5 stars
    Oh you don’t have to tell me twice. I’m all over this delicious looking bars already. Can’t wait to make them for me and my family. My kiddo will be delighted, I just know! Thanks!

  5. How mindlessly some of tend to enjoy products without knowing the history behind it. Informative to read about the origins of M&M. Those hues of green look so pretty and did you say mint flavored?Wow, wish I could have them. Cookie bars is a great gift idea.

    1. Yes, that is true! They would be great for gift giving! I thought the history behind M&M’s was fascinating, as well! Thank you Mayuri!

  6. 5 stars
    How cute you never go wrong with chocolate M&Ms and cookies. A perfect treat for St Patrick’s day, cheers!

  7. 5 stars
    I love that I can make these festive for any holiday! My girls will love helping me make these and sharing them with their friends.

    1. Kids just love making cookies! (and M&M’s) These one are so easy! They will have a blast! Thanks Kelly!

  8. 5 stars
    These are such a fun treat! I love that you can change them up for different occasions just by swapping the color of the M&Ms too.

    1. It’s great to one recipe that can be adapted to all seasons! Thanks you Caroline! Happy St. Patty’s Day!

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