Why You’ll Love M&M Cookie Bars Recipe
These M&M cookie bars are the ultimate crowd-pleaser. They’re easy to make in one big batch, perfect for sharing or storing for later. The contrast between the soft, chewy cookie center and the crunchy, candy-coated M&Ms creates a satisfying texture in every bite. They also bake more quickly than individual cookies and require less effort — no scooping needed. Customize them for holidays, birthdays, or any occasion with themed M&M colors.
Ingredients
(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)
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1 cup unsalted butter, softened to room temperature
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1 ½ cups brown sugar (light or dark)
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½ cup white sugar
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2 teaspoons vanilla extract
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3 large eggs
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3 cups all-purpose flour
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1 teaspoon baking powder
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1 teaspoon baking soda
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1 teaspoon salt
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2 cups M&Ms (Red, white, and blue mix, or other colorful candy-coated chocolates)
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2 cups chocolate chips
Directions
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Preheat the oven to 350°F. Line a rimmed baking sheet with parchment paper.
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In a large mixing bowl, cream together softened butter, brown sugar, and white sugar with an electric mixer until light and fluffy.
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Lightly beat the eggs and add them along with the vanilla extract to the butter and sugar mixture. Mix well with an electric mixer.
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In a separate bowl, whisk together the flour, baking powder, baking soda, and salt.
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Gradually add the dry ingredients to the wet mixture, mixing until well combined.
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Fold in the chocolate chips and 1 cup of M&Ms using a wooden or silicone spatula. The dough will be thick.
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Spread the dough evenly into the prepared baking sheet, pressing it into an even layer.
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Sprinkle the remaining 1 cup of M&Ms on top of the dough.
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Bake for 20–22 minutes, or until the edges are lightly browned and the center is just set.
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Let the cookie bars cool on the pan for at least 20 minutes before slicing into 36 bars.
Servings and timing
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Servings: 36 bars
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Prep Time: 20 minutes
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Cooking Time: 20–22 minutes
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Total Time: 1 hour
Variations
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Holiday-Themed Bars: Use seasonal M&Ms (e.g., red and green for Christmas, pastels for Easter).
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Nutty Twist: Add ½ cup chopped walnuts or pecans for a crunchier texture.
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Peanut Butter Version: Substitute half the butter with peanut butter for a nutty flavor.
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Gluten-Free Option: Use a gluten-free all-purpose flour blend.
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Mini Version: Bake in mini muffin tins for bite-sized cookie bar cups.
Storage/Reheating
Store the cooled cookie bars in an airtight container at room temperature for up to 5 days. For longer storage, freeze them in a single layer, then transfer to a zip-top bag for up to 2 months. To reheat, microwave individual bars for 10–15 seconds for a warm, gooey treat.
FAQs
How do I know when the cookie bars are done baking?
The edges will turn golden brown and the center should be just set. A slight jiggle is okay as they will continue to firm up while cooling.
Can I use different types of chocolate chips?
Yes, feel free to use milk, dark, white chocolate chips, or even a mix.
Can I halve this recipe?
Yes, you can cut all the ingredients in half and bake in an 8×8-inch or 9×9-inch pan. Adjust the baking time to around 18–20 minutes.
Do I need to chill the dough before baking?
No chilling is needed. This recipe is designed for immediate baking, which saves time.
Can I use salted butter instead of unsalted?
You can, but reduce the added salt to ½ teaspoon to compensate.
What size baking sheet should I use?
Use a standard 13×18-inch rimmed baking sheet for best results.
How do I cut the bars evenly?
Let them cool completely, then use a sharp knife or bench scraper to slice into even squares.
Can I use candy other than M&Ms?
Yes, chopped peanut butter cups, mini marshmallows, or crushed pretzels can be fun substitutes or additions.
Are these cookie bars freezer-friendly?
Absolutely. Freeze in layers with parchment between them for up to 2 months.
Can I make these bars egg-free?
You can try using egg substitutes like flax eggs or commercial egg replacers, though texture may vary slightly.
Conclusion
These M&M cookie bars are the perfect combination of chewy, gooey, and crunchy. They’re easy to make, fun to customize, and a guaranteed crowd-pleaser for any event or celebration. Whether you stick to the classic version or get creative with variations, this recipe is one you’ll come back to again and again.
