Oh, the holidays! For me, it’s not really Christmas without a pan of these incredible M&M Christmas Cookie Bars baking in the oven. Seriously, the smell alone is pure magic! I’ve been whipping these up for years, and they’re my absolute go-to for *any* holiday get-together. They’re just so easy, you know? No fuss, no fancy shaping, just a simple traybake dessert that brings smiles to everyone’s faces. I remember one year, my kitchen was a wreck, and I needed a last-minute dessert for a neighborhood potluck. These bars saved the day—and they were devoured in minutes!

Why You’ll Love These M&M Christmas Cookie Bars
Trust me, these bars are a total winner! They’re:
- Super Easy: Seriously, anyone can make these. It’s the perfect “easy traybake dessert” for when you’re short on time.
- Festive & Fun: With those bright red and green M&M’s, they just scream holiday cheer!
- Crowd-Pleasing: Who doesn’t love a chewy cookie bar loaded with chocolate?
- Party Perfect: They’re ideal for any holiday party or cookie exchange. Just cut and serve!
Essential Ingredients for M&M Christmas Cookie Bars
Alright, let’s get down to business! To make these delightful M&M Christmas Cookie Bars, you’ll need a few simple things you probably already have in your pantry. Grab your apron!
- 1 cup (that’s two sticks!) of unsalted butter, nice and softened. Make sure it’s not melted, just soft enough to squish easily.
- 1 cup of granulated sugar.
- 1 cup of packed light brown sugar. Packing it in makes sure you get the right amount for that lovely chewiness.
- 2 large eggs. These are the binders that hold everything together.
- 1 teaspoon of good old vanilla extract. It just makes everything taste better, right?
- 3 cups of all-purpose flour. This is the base of our cookie bar.
- 1 teaspoon of baking soda. This little guy helps them puff up just a bit.
- 1/2 teaspoon of salt. Don’t skip this! It balances out all the sweetness.
- And the star of the show: 2 cups of M&M’s candies! Make sure you grab the red and green ones for that perfect Christmas vibe.
Ingredient Notes and Substitutions for M&M Christmas Cookie Bars
So, why these specific ingredients? Well, that baking soda is key for giving our bars a little lift so they’re not totally flat. And the salt? It’s a flavor enhancer, making all those sweet notes really sing! If you only have salted butter on hand, no worries! Just use it instead of unsalted, but cut back on the added salt to about 1/4 teaspoon. It’s all about balance, and sometimes you just gotta work with what you’ve got in the kitchen!
How to Prepare M&M Christmas Cookie Bars: A Simple Guide
Alright, let’s get baking! I’ve made these M&M Christmas Cookie Bars so many times, I could probably do it with my eyes closed. It’s really straightforward, which is why I love them so much for busy holiday seasons. Here’s how we’ll get those delicious bars into your oven:
- First things first, let’s get that oven preheated to 350°F (175°C). While it’s warming up, grab your 9×13 inch baking pan. Give it a good grease and then a light flouring. This little step is crucial to make sure your bars don’t stick!
- Now, in a nice big bowl, we’re going to cream together the softened butter, the granulated sugar, and that lovely packed light brown sugar. Beat it until it’s all light and fluffy. This is where we start building that amazing texture.
- Next, crack in your two large eggs, one at a time, making sure to beat them in well after each addition. Then, give it a good stir with the vanilla extract.
- In a separate bowl, let’s get our dry ingredients ready. Whisk together the flour, baking soda, and salt. This just makes sure everything is evenly distributed before it goes into the wet stuff.
- Now, gradually add that dry mixture to your butter and sugar mixture. Mix until it’s *just* combined. Seriously, don’t overmix here! Overmixing can make your bars tough, and we want them nice and tender. A few streaks of flour are totally fine.
- Time for the fun part! Gently fold in those gorgeous red and green M&M’s. Try to get them distributed evenly without squishing the dough too much.
- Spread the dough evenly into your prepared baking pan. Use a spatula or the back of a spoon to get it nice and flat, reaching all the corners.
- Pop it into the preheated oven and bake for about 20 to 25 minutes. You’re looking for the edges to be a beautiful golden brown, and the center should look set.
- This is important: let the bars cool completely in the pan before you even think about cutting them. I know, the hardest part! But if you try to cut them hot, they’ll just crumble. Patience, my friend!

Tips for Perfectly Chewy M&M Christmas Cookie Bars
Want that perfect chewy texture? My biggest tip is to watch the baking time closely. For extra chewy bars, pull them out of the oven right around the 20-minute mark, or as soon as the edges are golden and the center looks *just* set. They’ll continue to bake a little in the hot pan. Overbaking is the enemy of chewiness, so err on the side of slightly underdone!
Serving and Storing Your M&M Christmas Cookie Bars
Once these beauties are completely cool, it’s time to cut them into squares. I usually go for about 24 bars from a 9×13 inch pan, but you can cut them bigger or smaller depending on your crowd! They look so festive just piled high on a platter, and they’re a guaranteed hit as a “party dessert idea.” To keep them fresh, just pop them into an airtight container at room temperature. They’ll stay wonderfully soft and chewy for about 3 days – if they last that long, that is!
Frequently Asked Questions about M&M Christmas Cookie Bars
Got questions about these festive bars? I’ve got answers! Making these M&M Christmas Cookie Bars is usually a breeze, but here are a few things people often ask:
Q1. Can I make these M&M Christmas Cookie Bars ahead of time?
Absolutely! These are perfect for making a day or two in advance. Just wait until they’re completely cooled, then store them in an airtight container at room temperature. They’re even better the next day, if you can believe it!
Q2. What other candies can I use in these Christmas cookie bars?
While red and green M&M’s are my favorite for Christmas, feel free to get creative! You can use any color M&M’s for other holidays or just use a mix. Chocolate chips, peanut butter chips, or even chopped nuts would be delicious additions too. Just make sure you have about 2 cups of mix-ins.
Q3. Are these bars suitable for a gluten-free diet?
This recipe uses regular all-purpose flour, so they aren’t gluten-free as written. However, you can easily make them gluten-free by substituting a good quality gluten-free all-purpose flour blend that contains xanthan gum. Just use a 1:1 ratio for the flour, and you should be good to go!
Q4. My bars seem a little dry, what did I do wrong?
Oh no! Usually, that means they were in the oven a little too long. For super chewy bars, try reducing the baking time by a few minutes. Also, make sure you’re using packed brown sugar, as the molasses in it adds moisture. And never, ever skip letting them cool completely in the pan!
Estimated Nutritional Information for M&M Christmas Cookie Bars
Just so you know, these numbers are estimates, as different brands of ingredients can change things up a bit. But generally, one of these yummy M&M Christmas Cookie Bars will give you about 250 calories, 12g of fat, 35g of carbohydrates, and 25g of sugar. They also have around 3g of protein. It’s always good to have a little idea of what you’re enjoying!
I absolutely love seeing your baking adventures! Have you made these festive M&M Christmas Cookie Bars? I’d be thrilled if you left a comment below to share your experience, rate the recipe, or even just tell me how much you loved them! If you snap a pic, tag me on social media – I can’t wait to see your colorful creations! You can find more inspiration on our Pinterest page.
Print
Amazing M&M Christmas Cookie Bars
- Total Time: 40 minutes
- Yield: 24 servings
- Diet: Vegetarian
Description
These M&M Christmas Cookie Bars are a festive and easy traybake dessert perfect for holiday parties. They combine the chewy texture of a cookie with colorful M&Ms for a delightful treat.
Ingredients
- 1 cup (2 sticks) unsalted butter, softened
- 1 cup granulated sugar
- 1 cup packed light brown sugar
- 2 large eggs
- 1 teaspoon vanilla extract
- 3 cups all-purpose flour
- 1 teaspoon baking soda
- 1/2 teaspoon salt
- 2 cups M&M’s candies (red and green for Christmas theme)
Instructions
- Preheat your oven to 350°F (175°C). Grease and flour a 9×13 inch baking pan.
- In a large bowl, cream together the softened butter, granulated sugar, and brown sugar until light and fluffy.
- Beat in the eggs one at a time, then stir in the vanilla extract.
- In a separate bowl, whisk together the flour, baking soda, and salt.
- Gradually add the dry ingredients to the wet ingredients, mixing until just combined. Do not overmix.
- Gently fold in the M&M’s candies.
- Spread the dough evenly into the prepared baking pan.
- Bake for 20-25 minutes, or until the edges are golden brown and the center is set.
- Let the bars cool completely in the pan before cutting into squares.
Notes
- For a chewier bar, bake for a shorter time.
- Use different colored M&M’s for other holidays or celebrations.
- Store in an airtight container at room temperature for up to 3 days.
- Prep Time: 15 minutes
- Cook Time: 25 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American





