Oreo M&M Blondies - A festive, rich, chewy blondie layers with Oreo cookies, M&M candies, and chocolate chips for a perfect holiday treat.

Combining two of my favorites in a cookie bar that is Christmas themed?? These Oreo M&M Blondies have a layer of oreo on the bottom, with a chewy M&M and chocolate chip cookie base! They are so festive and so delicious! You will be so surprised on how fast it is to make these!

Why You Should Make This Oreo M&M Blondies

As if you need anymore reasons, but here I am making sure you have no excuses to make these Oreo M&M Blondies!

Festive: These blondies are loaded with Christmas-themed Oreos, M&M candies, and chocolate chips, making them an easy Christmas treat!
Simple: With easy instructions, this recipe is a breeze to whip up.
Oreo bottom, cookie top: Lined with Oreo's and then topped with a chewy crunchy top!
Sweet and Salty: The optional touch of extra salt on top balances the sweetness, adding depth to the flavors.

Ingredient List - Oreo M&M Blondies

Additionally, I have provided some key ingredients for Oreo M&M Blondies that you might not have on hand. For a full list of ingredients, check out the recipe card below!

Festive Oreos - you can also use just regular!
Melted Butter - make sure it has cooled down before you start using it!
Brown Sugar - I use light brown sugar, but feel free to use whatever you have on hand.
Vanilla Extract - I like using pure vanilla extract, but you can use vanilla flavoring.
Season M&M's - I just found these at my local grocery store.

Tips For Making Oreo M&M Blondies

To clarify, I have given you some tips on how to successfully make this recipe! For the full instructions, check out the recipe card below.

Properly Preheat the Oven: Ensure your oven is fully preheated to 350°F (175°C) before placing the blondies inside. This helps with even baking.
Use Room Temperature Eggs: Room temperature eggs mix more evenly into the batter and can prevent underbaking.
Don't Overmix: When combining the dry ingredients with the wet ingredients, mix just until everything is combined. Overmixing can lead to dense and undercooked blondies.
Test for Doneness: To prevent raw centers, use a toothpick or a cake tester. Insert it into the center of the blondies - if it comes out with a few moist crumbs but not raw batter, they're done.
Golden Top: Aim for a golden-brown top; this is a good indicator of doneness. It usually takes about 25-30 minutes, but it can vary slightly based on your oven.
Cooling Time: Allow the blondies to cool in the pan for about 15 minutes after removing them from the oven. This helps them set further.
Avoid Overcrowding: Ensure the blondie batter is spread evenly over the Oreos; overcrowding can lead to uneven baking.
Quality Oven Thermometer: Sometimes oven temperature can vary, so using an oven thermometer can help ensure your oven is at the correct temperature for baking.

What's In Molly's Kitchen?

I have given you all the equipment I used in this recipe!

8x8-inch Baking Dish: For baking the blondies. It's best to line it with parchment paper for easy removal.
Metal Binder Clips: To secure the parchment paper to the sides of the baking dish.
Mixing Bowls: You'll need at least one large mixing bowl for combining the wet and dry ingredients.
Whisk: Used for whisking together the melted butter and brown sugar.
Spatula: A rubber spatula is helpful for gently folding the dry ingredients and mix-ins into the batter.
Cooling Rack: To allow the blondies to cool after baking.
Toothpick or Cake Tester: For testing the doneness of the blondies by inserting it into the center to check for moist crumbs.
Oven Thermometer: Optional but helpful to ensure your oven is at the correct temperature.

Frequently Asked Questions - Oreo M&M Blondies

Lastly, here are some questions you might have in regards to making this Oreo M&M Blondies! If you have anymore questions please feel free to leave a comment below!

Can I use regular Oreos instead of Christmas-themed ones?

Yes, regular Oreos work perfectly in this recipe. The holiday-themed Oreos are just for added festive flair.

Can I use salted butter instead of unsalted butter?

You can, but using unsalted butter allows you to control the salt content in the recipe. If you use salted butter, consider reducing the additional salt in the recipe.

Why do my blondies sometimes come out raw in the center?

This can happen if the blondies are underbaked. Make sure to test for doneness with a toothpick and let them cool in the pan for 15 minutes to set.

Is it okay to use a glass baking dish instead of a metal one?

Yes, you can use a glass baking dish. Just be cautious with temperature changes to prevent the glass from cracking. Preheat the oven with the dish inside.

Storing and Freezing

To store Christmas-themed Oreo M&M Blondies, allow them to cool completely. Then, place the cooled blondies in an airtight container or wrap them tightly in plastic wrap. Store at room temperature for up to 3-4 days, or in the refrigerator for longer freshness.

Freezing

To freeze Christmas-themed Oreo M&M Blondies, ensure they have cooled completely. Wrap them tightly in plastic wrap and aluminum foil, or place them in an airtight container. Store in the freezer for up to 2-3 months, and thaw in the refrigerator before serving.

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Recipe

Oreo M&M Blondies

Molly Murphy

A festive, rich, chewy blondie layers with Oreo cookies, M&M candies, and chocolate chips for a perfect holiday treat.

5 from 4 votes

Print Recipe Pin Recipe

Servings squares

Ingredients

16 Christmas themed Oreo regular works great too!
½ cup unsalted butter melted and cooled
1 cup light brown sugar packed
1 large egg room temperature
1 large egg yolk room temperature
¾ teaspoon pure vanilla extract
½ teaspoon baking soda
½ teaspoon baking powder
1 teaspoon corn starch
1 ¾ cup all-purpose flour spoon and leveled
½ cup Christmas M&M
½ cup semi sweet chocolate chips

Instructions

For the blondies

Preheat your oven to 350°F (175°C) and line the bottom of an 8x8-inch baking dish with parchment paper, using metal binder clips to secure the parchment paper to the sides. Lightly spray the sides and the bottom of the pan with cooking spray.
Line the Oreos on the bottom of the baking dish in an even layer, creating 4 rows of 4.
In a large mixing bowl, whisk together the melted and cooled butter and the packed light brown sugar until well combined.
Add the room temperature egg, egg yolk, and vanilla extract to the butter and sugar mixture. Mix until everything is well incorporated.
Using a rubber spatula, gently fold together the all-purpose flour, baking soda, baking powder, cornstarch, Christmas M&M candies, and semi-sweet chocolate chips until they are evenly distributed throughout the batter. Do not overmix; you want a thick blondie batter.
Evenly spread the blondie batter over the Oreo cookies in the baking dish.
Bake in the preheated oven for approximately 25-30 minutes, or until the top is golden brown and a toothpick inserted into the center comes out with a few moist crumbs. You want the top to be nice and golden.
Remove the baking dish from the oven and allow it to cool in the pan for about 15 minutes.
Use the overhanging parchment paper to lift the blondies out of the pan and place them on a wire rack to cool completely.
Once cooled, cut the blondies into squares and enjoy your delicious Christmas-themed Oreo M&M Blondies! Optionally, top with extra salt for added flavor.

Tried this recipe?Let us know how it was!

Super Easy Holiday Oreo M&M Blondies