Name: Cookie Bars Recipe
Prep time: 10 min
Cook time: 25 min
Total time: 35 min
Cuisine: American
Ingredients: 1/2 cup unsalted butter (softened); 2 cups brown sugar; 2 eggs; 1 tsp vanilla extract; 1/2 tsp salt; 1 tsp baking powder; 2 cups all purpose flour; 1 cup Christmas M&Ms; 1/4 cup Christmas jimmies sprinkles

Jump to Recipe· 3.8 from 11 reviews

I absolutely adore this Cookie Bars Recipe because it combines the nostalgic charm of classic cookies with the ease of making a single pan dessert. The chewy, buttery base studded with festive Christmas M&Ms and sprinkles makes each bite a joyful surprise. I think it’s a perfect treat to whip up when you want something comforting yet playful without fussing over individual cookies, plus it always impresses guests and family alike.

Why You’ll Love This Cookie Bars Recipe

What makes this recipe stand out to me is its wonderfully balanced flavor profile. The brown sugar and butter create this rich, caramel-like depth that hugs the bright pops of vanilla and the festive crunch of M&Ms and sprinkles. It’s like a warm hug from your favorite holiday traditions wrapped into one easy bar, perfect for anytime you want a bit of sweet cheer.

I also appreciate how straightforward the preparation is. No complicated steps or special equipment—just mix, fold, and bake. It’s an approachable recipe that doesn’t skimp on that homemade, tender-chewy texture I love. Whether I’m making these for a holiday party, a casual family dessert, or just a weeknight treat, I always feel confident the results will be delicious and crowd-pleasing.

Ingredients You’ll Need

This image shows an overhead view of baking ingredients arranged neatly on a white marbled surface. At the top center is a white bowl filled with light brown sugar with a crumbly texture. To its upper left is a stick of butter in its wrapper, and just below are two white eggs resting directly on the surface. Below the butter, on the left side, is a small white square dish containing a few white powders, likely baking soda and salt. Centered below the brown sugar bowl is a glass measuring cup full of white flour. To the right of the flour is a small clear bowl filled with red, white, and green sprinkles. Below the flour to the left, there is a clear bowl filled with red and green candy-coated chocolates, and to the right of it, there is a small white bowl with dark brown vanilla extract. All items are set on the white marbled background, spaced evenly for a clean, organized look photo taken with an iphone --ar 4:5 --v 7

The ingredients for this recipe are delightfully simple but essential for achieving that perfect combination of flavor, texture, and festive color. Each one plays an important role that elevates these cookie bars from good to irresistible.

Unsalted butter (1/2 cup softened): Provides a rich, creamy base that contributes to the tender texture and buttery flavor.
Brown sugar (2 cups): Adds moisture and depth with its caramel notes while keeping the bars chewy.
Eggs (2): Bind the ingredients together and give structure without drying out.
Vanilla extract (1 tsp): Infuses a sweet, aromatic warmth that enhances all the flavors.
Salt (1/2 tsp): Balances the sweetness and brightens the overall taste.
Baking powder (1 tsp): Lightens the dough so the bars aren’t too dense, giving just the right lift.
All-purpose flour (2 cups): The foundation that holds everything together with a perfect chewy bite.
Christmas M&Ms (1 cup): Adds colorful bursts of chocolate and crunch, making the bars festive and fun.
Christmas jimmies sprinkles (1/4 cup): Gives extra visual appeal and a slight sugary crunch that feels like a celebration in every bite.

Directions

Step 1: Preheat your oven to 350°F (175°C) and line a 9×13-inch baking pan with parchment paper. This ensures easy removal and cleanup later.

Step 2: In a large mixing bowl, beat the softened butter and brown sugar together until the mixture is creamy and smooth. This usually takes about 2-3 minutes with an electric mixer. Then, add the eggs one at a time, mixing well after each addition. Stir in the vanilla extract and continue beating until everything is fully combined.

Step 3: In a separate bowl, whisk together the flour, salt, and baking powder so they’re evenly distributed. Then, gently fold these dry ingredients into the wet mixture. Stir just until the dough comes together—avoid overmixing to keep the bars soft and tender.

Step 4: Fold in the Christmas M&Ms and jimmies sprinkles, evenly distributing them throughout the dough. Press the dough firmly and evenly into the prepared baking pan with your hands or the back of a spatula.

Step 5: Bake for 22 to 25 minutes, or until the edges are golden brown and the center appears set but still soft. Resist the urge to overbake to maintain that perfect chewy texture.

Step 6: Allow the cookie bars to cool completely in the pan on a wire rack. Once cool, lift the bars out using the parchment paper and slice into squares. Enjoy!

Servings and Timing

This Cookie Bars Recipe yields about 15 generous servings, making it ideal for sharing. The prep time is roughly 10 minutes since the ingredients come together quickly. Baking takes around 22 to 25 minutes, and you’ll want to allow about 20 minutes for cooling to ensure the bars slice cleanly. In total, from start to finish, you’re looking at approximately 50-55 minutes to a delicious batch of cookie bars.

How to Serve This Cookie Bars Recipe

A rectangular baked blondie bar with a light golden brown top layer that looks soft and slightly cracked, embedded with scattered red and green candy-coated chocolates throughout the surface, showing hints of candies inside the edges. The blondie rests on a white parchment paper, which sits on a black metal cooling rack, all set against a white marbled background. photo taken with an iphone --ar 4:5 --v 7

When it comes to serving these cookie bars, I love to keep things simple to highlight their festive charm. They’re perfect on their own with a glass of cold milk or a cozy cup of hot chocolate. For a grown-up twist, I sometimes serve them alongside a rich espresso or a creamy vanilla latte to enhance their sweetness.

If you’re looking to dress them up for a party or holiday gathering, sprinkling a few extra Christmas jimmies or some powdered sugar on top adds a lovely visual touch. I also enjoy pairing them with a bowl of fresh berries or a scoop of vanilla bean ice cream, which complements the chewy texture and adds a refreshing contrast.

These bars are best served at room temperature, which balances the chocolate’s firmness and the tender crumb beautifully. However, serving them slightly warmed (just 10-15 seconds in the microwave) brings out the melty chocolate goodness in the M&Ms, which always gets me excited. Cut them into 2-inch squares for perfect finger-food portions that folks can enjoy casually at gatherings or as a sweet afternoon snack.

Variations

I love experimenting with this Cookie Bars Recipe to keep things fresh and suit different dietary needs or flavor cravings. For instance, swapping the Christmas M&Ms for dark chocolate chips or white chocolate chunks creates a whole new flavor experience. Adding chopped nuts like pecans or walnuts adds a delightful crunch and earthiness.

If you need a gluten-free version, I’ve had great success replacing the all-purpose flour with a quality gluten-free baking blend. Just make sure the blend contains xanthan gum or a similar binder for the right texture. For a vegan twist, substitute the butter with coconut oil or vegan margarine, and use flax eggs (1 tablespoon ground flaxseed + 3 tablespoons water per egg) instead of regular eggs—these changes still deliver a tasty, chewy result.

For those who like a bit of spice, I sometimes add a teaspoon of ground cinnamon or pumpkin pie spice to the dry ingredients. It adds a warm note that pairs wonderfully with the sweet M&Ms. You could even try baking these bars in muffin tins for individual servings if you want more portable treats with crunchy edges all around.

Storage and Reheating

Storing Leftovers

To keep your cookie bars fresh, I recommend storing them in an airtight container at room temperature. They’ll stay soft and flavorful for up to 4 days. If the weather is warm, storing them in the fridge is also fine—just bring them to room temperature before serving so they’re not too firm.

Freezing

This recipe freezes beautifully. To freeze, cut the cooled cookie bars into squares and place them in a single layer on a parchment-lined baking sheet. Freeze for about two hours, then transfer them to a freezer-safe zip-top bag or airtight container. They keep well for up to 3 months. When you’re ready to enjoy, thaw them at room temperature or warm them briefly in the microwave.

Reheating

To bring back that just-baked warmth, pop a single bar into the microwave for 10-15 seconds—just enough to soften the edges and melt the chocolate slightly. Avoid overheating, which can make the bars dry or too soft. You can also warm them gently in a preheated oven at 300°F (150°C) for 5 minutes if you prefer a more evenly warmed treat without losing texture.

FAQs

Can I use other types of chocolate candies instead of Christmas M&Ms?

Absolutely! You can swap in peanut butter M&Ms, regular chocolate chips, white chocolate chunks, or even chopped candy bars. Just be mindful that some add-ins may melt differently or alter the sweetness slightly.

How do I prevent the bars from being too dry or crumbly?

Make sure not to overbake—the center should look set but still soft. Also, cream the butter and sugar well to incorporate air and keep it tender. Avoid overmixing the dough once you add the flour to preserve the chewy texture.

Can this recipe be made without eggs?

Yes! You can replace each egg with a flax egg (1 tablespoon ground flaxseed mixed with 3 tablespoons water, left to gel), or use commercial egg replacers. This works well and maintains good binding and moisture in the bars.

Is it possible to make this cookie bars recipe vegan?

Definitely. Use vegan butter or coconut oil instead of regular butter and replace eggs with flax or chia eggs. Also, ensure your sprinkles and M&Ms are vegan-friendly, as some contain confectioner’s glaze or milk derivatives.

What’s the best pan size to use?

A 9×13-inch pan is ideal as it ensures even thickness and baking. Using a different size will affect baking times, so adjust accordingly and watch closely to avoid over- or under-baking.

Conclusion

I hope you’re as excited to try this Cookie Bars Recipe as I am to share it with you. It’s one of those versatile, fun-to-make treats that feels special whether it’s for the holidays or just a cozy day at home. Give it a go and watch how quickly it disappears—these bars always bring smiles and happy moments in my kitchen, and I’m sure they’ll do the same for you!