These Festive Peppermint Brookie Bars for Christmas are pure holiday comfort. They bring together two favorite treats in one pan, so you get a fudgy brownie bite and a soft cookie bite in every square. I love recipes like this because they feel special, yet they still fit into a busy home kitchen. Also, they look festive enough for a cookie tray, but they are easy enough for a casual family night too.
What makes these brookie bars so appealing is the mix of rich cocoa, cool peppermint, sweet vanilla, and crunchy Oreos. The brownie layer uses unsalted butter, granulated sugar, brown sugar, an egg, peppermint extract, all-purpose flour, unsweetened cocoa powder, salt, and crushed Oreo sandwich cookies. Then the cookie layer adds butter, brown sugar, granulated sugar, an egg, vanilla extract, flour, baking powder, salt, and semisweet chocolate chips. Finally, a little flaky sea salt on top can make the sweet flavors pop even more. The result is balanced, chewy, and full of Christmas flavor.
The method is simple, which is another reason I like it so much. First, you heat the oven to 350°F and line an 8- or 9-inch square pan with foil. Then you make the brownie batter and the cookie dough, both by melting the butter with the sugars, cooling the mixture for a few minutes, and stirring in the remaining ingredients. After that, you drop spoonfuls of both batters into the pan, lightly swirl them, top with the rest of the crushed Oreos, and bake for about 30 minutes. Once cooled, you cut the pan into 16 squares. The total time is about 1 hour 5 minutes, including cooling, and each bar is about 230 kcal.
These peppermint brookie bars are perfect for chilly nights, Christmas potlucks, holiday bake sales, and gift boxes for neighbors or friends. They also travel well, which makes them a good choice when you need something sweet that still holds its shape. So, if you want a dessert that feels festive without being fussy, this is a great one to keep on hand.
Why You’ll Love This Festive Peppermint Brookie Bars for Christmas
- Two desserts in one pan: You get brownie and cookie in every bite, so nobody has to choose.
- Holiday flavor that stands out: Peppermint, chocolate, vanilla, and Oreo all work together very well.
- Simple pantry ingredients: Most items are common baking staples, so shopping is easy.
- Great for sharing: Since the recipe makes 16 servings, it is ideal for family gatherings and holiday trays.
- Easy to make ahead: These bars keep well, so you can bake them before the party and relax later.
Butter Tips
Butter plays a big role in the texture of these Festive Peppermint Brookie Bars for Christmas, so use fresh, good-quality unsalted butter if you can. Since the recipe melts the butter instead of creaming it, you do not need it to be soft at room temperature. However, you do want to melt it slowly over medium-low heat so it stays smooth and does not scorch. In addition, let the melted butter cool for a few minutes before adding the egg. That small pause helps keep the egg from scrambling and gives you a better batter.
Options for Substitutions
- Use dark chocolate cocoa instead of regular cocoa for a deeper brownie flavor.
- Swap the peppermint extract for mint extract if that is what you have, but use a little less because mint extract can taste stronger.
- Replace Oreos with another chocolate sandwich cookie if needed.
- Use dark chocolate chips instead of semisweet chips for a richer cookie layer.
- Try white chocolate chips for a sweeter holiday twist.
- Use store-brand foil or parchment if you prefer a different lining method, but keep the pan well greased so the bars lift out cleanly.
Watch Out for These Mistakes
First, do not rush the cooling step after melting the butter and sugars. If the mixture is too hot, the egg can cook too fast, and the batter may turn grainy. Instead, let it sit for a few minutes. That small pause helps both layers blend smoothly and keeps the texture soft.
Next, be careful not to overmix either batter. When you add the flour, cocoa, and salt to the brownie layer, stir only until the dry spots disappear. Then do the same with the cookie dough. Overmixing can make the bars dense, and for this recipe, you want a chewy, tender bite.
Also, watch the bake time closely. The center should come out barely clean on a toothpick, not completely dry. If you bake too long, the brookie bars can lose their fudgy middle and turn dry around the edges. Since ovens vary, start checking near the 28-minute mark.
Finally, do not cut the bars too soon. They need about 20 minutes on a rack before you lift them out and slice them. If you move too fast, the bars may fall apart. On the other hand, if you wait until they are fully cold, they will slice even more neatly.
What to Serve With Festive Peppermint Brookie Bars for Christmas?
These Festive Peppermint Brookie Bars for Christmas pair well with a mug of hot chocolate, coffee, or warm tea, since the cool peppermint and rich chocolate taste especially nice with a hot drink. You could also serve them with vanilla ice cream for a simple dessert plate. In addition, a bowl of fresh berries can add a bright, tart contrast. If you are making a holiday dessert spread, they fit nicely beside sugar cookies, peppermint bark, or a simple fruit salad.
Storage Instructions
Store: Keep the bars in an airtight container at room temperature for 3 to 4 days. If your kitchen is warm, or if you want them to last longer, refrigerate them for up to 1 week.
Freeze: Wrap the cut bars well and place them in a freezer-safe container or bag. They can be frozen for up to 2 months. For best results, place parchment between layers so they do not stick together.
Reheat: For the stovetop, warm a bar in a covered skillet on very low heat for a minute or two, just until soft. For the microwave, heat one bar for 10 to 15 seconds. Start small, because these bars warm quickly and can become too soft if overheated.
Recipe Info
Preparation Time: 15 minutes
Cooking Time: 30 minutes
Total Time: 1 hour 5 minutes
Level of Difficulty: Easy
Servings: 16 servings
Estimated Nutrition
Estimated nutrition for the whole recipe (without optional ingredients):
Calories: 3,400 to 3,800 kcal
Protein: 36 to 44 g
Fat: 170 to 210 g
Carbohydrates: 430 to 500 g
Ingredients
- Peppermint brownie layer:
- 1/4 cup (4 tablespoons) unsalted butter
- 1/3 cup granulated sugar
- 1/3 cup packed brown sugar
- 1 large egg
- 3/4 teaspoon peppermint extract
- 1/3 cup all-purpose flour
- 1/3 cup unsweetened cocoa powder
- 1/4 teaspoon salt
- 10 Oreo sandwich cookies, crushed into 1/2-inch pieces and divided (half in the batter, half on top)
- Chocolate chip cookie layer:
- 6 tablespoons unsalted butter
- 1/2 cup packed brown sugar
- 1/3 cup granulated sugar
- 1 large egg
- 1 teaspoon vanilla extract
- 1 cup all-purpose flour
- 1 teaspoon baking powder
- 3/4 teaspoon salt
- 1/2 cup semisweet chocolate chips, plus extra if you like
- Optional finish:
- Flaky sea salt
Step-by-Step Instructions
Step 1: Prepare the Pan and Heat the Oven
Start by heating your oven to 350°F. Then line an 8- or 9-inch square pan with foil and lightly grease the bottom. This makes it easier to lift the brookie bars out after baking, and it also helps with clean slices later.
Step 2: Make the Peppermint Brownie Batter
Melt the butter with both sugars over medium-low heat, stirring until the mixture is smooth. After that, let it cool for a few minutes. Whisk in the egg and peppermint extract, then stir in the flour, cocoa powder, and salt until the batter is almost combined. Fold in half of the crushed Oreos, and set the brownie batter aside.
Step 3: Make the Chocolate Chip Cookie Dough
Using the same method, melt the butter with both sugars for the cookie layer. Again, let the mixture cool for a few minutes before whisking in the egg and vanilla. Stir in the flour, baking powder, and salt until nearly combined, then fold in the chocolate chips. This dough should be thick and soft, so do not worry if it looks a little rustic.
Step 4: Layer and Swirl the Batters
Drop alternating spoonfuls of brownie batter and cookie dough into the prepared pan so every bar gets both flavors. If you want a more marbled look, gently swirl the top with a knife or spoon. Then press the remaining crushed Oreos over the surface so they bake into the top of the bars.
Step 5: Bake, Cool, and Slice
Bake for about 30 minutes, or until a toothpick inserted in the center comes out barely clean. After that, cool the pan on a rack for about 20 minutes. Lift the bars out using the foil, cut them into 16 squares, and finish with a pinch of flaky sea salt if you like. Serve warm or at room temperature.
Conclusion
These Festive Peppermint Brookie Bars for Christmas are a simple way to bring holiday flavor into one easy pan. You get the richness of brownie, the comfort of chocolate chip cookie dough, and the fun crunch of Oreos in every bite. Plus, the peppermint gives them a bright, seasonal touch that feels perfect for December.
If you are looking for a dessert that is easy, crowd-friendly, and full of Christmas spirit, this recipe is a wonderful choice. Give it a try, then let me know how your batch turned out. You can also explore more holiday bar recipes if you want more cozy baking ideas for the season.
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Festive Peppermint Brookie Bars for Christmas
- Prep Time: 15 minutes
- Cook Time: 30 minutes
- Total Time: 65 minutes
- Yield: 16 servings 1x
- Category: Dessert
- Method: Baking
- Cuisine: American
- Diet: Vegetarian
Description
Delicious brookie bars combining fudgy brownie and soft cookie topped with crunchy Oreos and a hint of peppermint, perfect for the holiday season.
Ingredients
- 1/4 cup (4 tablespoons) unsalted butter
- 1/3 cup granulated sugar
- 1/3 cup packed brown sugar
- 1 large egg
- 3/4 teaspoon peppermint extract
- 1/3 cup all-purpose flour
- 1/3 cup unsweetened cocoa powder
- 1/4 teaspoon salt
- 10 Oreo sandwich cookies, crushed (divided)
- 6 tablespoons unsalted butter
- 1/2 cup packed brown sugar
- 1/3 cup granulated sugar
- 1 large egg
- 1 teaspoon vanilla extract
- 1 cup all-purpose flour
- 1 teaspoon baking powder
- 3/4 teaspoon salt
- 1/2 cup semisweet chocolate chips
- Flaky sea salt (optional)
Instructions
- Prepare the Pan and Heat the Oven: Start by heating your oven to 350°F. Then line an 8- or 9-inch square pan with foil and lightly grease the bottom.
- Make the Peppermint Brownie Batter: Melt the butter with both sugars over medium-low heat. Let it cool for a few minutes, whisk in the egg and peppermint extract, then stir in the flour, cocoa powder, and salt until nearly combined. Fold in half of the crushed Oreos.
- Make the Chocolate Chip Cookie Dough: Melt the butter with both sugars for the cookie layer, cool slightly, then whisk in the egg and vanilla. Stir in the flour, baking powder, and salt, then fold in the chocolate chips.
- Layer and Swirl the Batters: Drop alternating spoonfuls of brownie batter and cookie dough into the prepared pan. Gently swirl the top with a knife if desired and press the remaining crushed Oreos over the surface.
- Bake, Cool, and Slice: Bake for about 30 minutes or until a toothpick inserted comes out barely clean. Cool for about 20 minutes, lift out, slice into 16 squares, and top with flaky sea salt if desired.
Notes
These bars store well in an airtight container for 3-4 days at room temperature or up to 1 week in the refrigerator, and they can be frozen for up to 2 months.
Nutrition
- Serving Size: 1 bar
- Calories: 230
- Sugar: 15g
- Sodium: 150mg
- Fat: 11g
- Saturated Fat: 6g
- Unsaturated Fat: 5g
- Trans Fat: 0g
- Carbohydrates: 30g
- Fiber: 1g
- Protein: 2g
- Cholesterol: 30mg
