Halloween M&M Cookie Bars Easy Recipe

M&M’s Halloween Cookie Bars are a simple, cheerful treat that always shows up for fall get-togethers. They are like a big, soft chocolate chip cookie, but baked in a pan and cut into easy bars, loaded with those fun Halloween M&M’s. My kids absolutely love them, and honestly, so do I. The texture is just perfect: chewy cookie, gooey chocolate chips, and the crisp candy shells from the M&M’s. It’s a fantastic combination that works every time. Plus, who doesn’t want extra candy? Making these M&M’s Halloween Cookie Bars is quick, which is a big plus when you’re busy planning parties or just want a homemade dessert without a lot of fuss. They’re great for bake sales, Halloween parties, or just a rainy afternoon when you need a pick-me-up.

M&M’s Halloween Cookie Bars

These M&M’s Halloween Cookie Bars are my go-to for any fall gathering or just when I need a cheerful treat. They’re basically a giant, soft, chewy chocolate chip cookie cut into bars, but loaded with those festive Halloween M&M’s. They come together quickly and are always a huge hit, especially with the kids. The combination of the chewy cookie base, melty chocolate chips, and the crunchy candy shells of the M&M’s is just spot on. Plus, you can never go wrong with extra candy on top, right?

Ingredients:

• 2 sticks of unsalted butter (at room temperature)
• 1 cup granulated sugar
• 1 cup firmly packed golden brown sugar
• 3 large eggs (at room temperature)
• 1 1/2 teaspoons pure vanilla extract
• 3 cups all-purpose flour (spooned and leveled)
• 3/4 teaspoon baking soda
• 3/4 teaspoon salt
• 1 1/2 cups Halloween M&M’S (plus more for topping)
• 1 cup mini chocolate chips (plus more for topping)

Instructions:

1. Prep Your Pan and Preheat Your Oven.
   First things first, get your baking pan ready. I use a standard 9×13 inch baking pan for these bars. It’s important to grease it well. You can use butter, shortening, or baking spray. I like to line my pan with parchment paper, leaving some overhang on the sides. This makes it incredibly easy to lift the whole slab of cookie bars out of the pan once they’re baked and cooled. You can then place the parchment paper on a cutting board and slice them into bars. Preheat your oven to 350°F (175°C). Getting the oven to the correct temperature beforehand ensures even baking.

2. Cream the Butter and Sugars.
   In a large mixing bowl, or the bowl of your stand mixer fitted with the paddle attachment, combine the 2 sticks of softened unsalted butter with the 1 cup of granulated sugar and the 1 cup of firmly packed golden brown sugar. Beat these together on medium speed until the mixture is light, fluffy, and pale in color. This usually takes about 3-4 minutes. Creaming the butter and sugars properly incorporates air into the dough, which is key for a tender cookie bar. Make sure your butter is truly at room temperature – not melted, but soft enough that you can easily indent it with your finger. If it’s too cold, it won’t cream properly. If it’s too warm, it might melt the sugars and lead to a greasy texture.

3. Incorporate the Wet Ingredients.
   Once the butter and sugars are creamed, it’s time to add the eggs and vanilla extract. Add the 3 large eggs, one at a time, beating well after each addition to ensure they are fully incorporated. Scrape down the sides of the bowl as needed. Then, add the 1 1/2 teaspoons of pure vanilla extract and beat until just combined. The eggs add richness and structure to the bars. Using room temperature eggs helps them emulsify better with the butter and sugar mixture, leading to a smoother batter. If your eggs are cold, you can quickly warm them by placing them in a bowl of warm (not hot) water for about 5 minutes.

4. Combine the Dry Ingredients and Add to Wet.
   In a separate medium bowl, whisk together the 3 cups of all-purpose flour (make sure you spoon it into your measuring cup and level it off with a straight edge, don’t scoop directly from the bag as this can pack too much flour in), the 3/4 teaspoon of baking soda, and the 3/4 teaspoon of salt. Whisking these dry ingredients together ensures that the baking soda and salt are evenly distributed throughout the flour, which is essential for consistent leavening and flavor. Now, gradually add the dry ingredients to the wet ingredients. Mix on low speed until just combined. Be careful not to overmix at this stage. Overmixing can develop the gluten in the flour too much, resulting in tough cookie bars. Stop mixing as soon as you no longer see streaks of flour.

5. Fold in the Goodies and Bake.
   Now for the fun part! Gently fold in the 1 1/2 cups of Halloween M&M’s and the 1 cup of mini chocolate chips using a rubber spatula or wooden spoon. Stir just until they are evenly distributed throughout the dough. You want to be careful not to crush the M&M’s or melt the chocolate chips too much during this step. Now, spread the cookie dough evenly into your prepared 9×13 inch baking pan. You can use your spatula or even lightly greased hands to press the dough into an even layer. For extra festivity and chocolatey goodness, sprinkle a few more Halloween M&M’s and mini chocolate chips over the top of the dough before baking. Bake in your preheated oven for 25-30 minutes, or until the edges are golden brown and the center is set but still looks slightly soft. A toothpick inserted into the center should come out with moist crumbs attached, not wet batter.

6. Cool and Cut.
   This is probably the hardest part – waiting for them to cool! Let the cookie bars cool completely in the pan on a wire rack. This is essential for them to set properly. If you try to cut them while they’re still warm, they will likely fall apart. Once they are completely cooled (this can take a couple of hours), use the parchment paper overhang to lift the entire slab out of the pan and onto a cutting board. Now, using a sharp knife, cut the slab into squares or rectangles. For easier cutting, you can run your knife under hot water and wipe it dry between cuts. Store any leftover bars in an airtight container at room temperature for up to 3-4 days. They are delicious enjoyed plain or with a glass of milk.

Conclusion:

These M&M’s Halloween Cookie Bars are a straightforward, crowd-pleasing dessert that brings smiles every time. The soft, chewy texture combined with the classic chocolate chip flavor and the festive crunch of Halloween M&M’s makes them a winner for any occasion. They are simple enough for a weeknight treat but special enough for any fall party. Don’t hesitate to make a double batch; they disappear fast! You can serve them as is, maybe with a glass of cold milk, or even stack them up for a fun dessert presentation. For variations, consider adding a sprinkle of coarse sea salt on top before baking for a sweet and salty contrast, or mix in some chopped nuts if you like a bit more crunch. They also store really well, making them perfect for making ahead.

Frequently Asked Questions:

Can I use regular M&M’s instead of Halloween ones?

Absolutely! If you can’t find the Halloween-themed M&M’s, feel free to use regular milk chocolate M&M’s or any other flavor you prefer. The candy shell will provide a nice texture contrast.

How should I store these cookie bars?

Store the cooled M&M’s Halloween Cookie Bars in an airtight container at room temperature for up to 3-4 days. You can place parchment paper between layers if you stack them to prevent sticking.

Can I freeze these bars?

Yes, you can. Wrap individual bars or the whole slab tightly in plastic wrap and then in aluminum foil. Freeze for up to 2-3 months. Thaw them at room temperature before serving.

M&M’s Halloween Cookie Bars

Easy and delicious Halloween-themed cookie bars loaded with M&M’s and chocolate chips.

Prep Time
20 Minutes

Cook Time
30 Minutes

Total Time
50 Minutes

Servings
24

Ingredients

• 2 sticks of unsalted butter (at room temperature)
• 1 cup granulated sugar
• 1 cup firmly packed golden brown sugar
• 3 large eggs (at room temperature)
• 1 1/2 teaspoons pure vanilla extract
• 3 cups all-purpose flour (spooned and leveled)
• 3/4 teaspoon baking soda
• 3/4 teaspoon salt
• 1 1/2 cups Halloween M&M’S (plus more for topping)
• 1 cup mini chocolate chips (plus more for topping)

Instructions

1. Step 1
   Preheat oven to 350°F (175°C). Line a 9×13 inch baking pan with parchment paper, leaving an overhang on the sides.
2. Step 2
   In a large bowl, cream together the softened butter, granulated sugar, and brown sugar until light and fluffy.
3. Step 3
   Beat in the eggs one at a time, then stir in the vanilla extract.
4. Step 4
   In a separate bowl, whisk together the flour, baking soda, and salt.
5. Step 5
   Gradually add the dry ingredients to the wet ingredients, mixing until just combined. Do not overmix.
6. Step 6
   Fold in 1 1/2 cups of Halloween M&M’S and 1 cup of mini chocolate chips.
7. Step 7
   Spread the dough evenly into the prepared baking pan. Sprinkle with additional M&M’S and chocolate chips if desired.
8. Step 8
   Bake for 25-30 minutes, or until golden brown and a toothpick inserted into the center comes out with moist crumbs.
9. Step 9
   Let the bars cool completely in the pan before lifting out using the parchment paper. Cut into squares.

Important Information

Nutrition Facts (Per Serving)

It is important to consider this information as approximate and not to use it as definitive health advice.

Allergy Information

Please check ingredients for potential allergens and consult a health professional if in doubt.