Are you ready to elevate your dessert game with something that combines the best of both worlds? Loaded M&M Oreo Cookie Bars are not just a sweet treat; they are an experience. Whether you’re hosting a gathering, celebrating a special occasion, or simply indulging yourself after a long day, these bars are sure to satisfy your cravings. With a rich, buttery base, crunchy Oreo pieces, and colorful M&Ms, each bite is a delightful explosion of flavors and textures. Let’s dive into why this recipe deserves a spot in your baking rotation!
Why This Recipe Belongs in Your Rotation

Loaded M&M Oreo Cookie Bars bring together the classic flavors of cookies and candy in a simple yet irresistible format. These bars are perfect for sharing with friends and family, making them ideal for parties, bake sales, or cozy nights in. The beauty of this recipe lies in its versatility—feel free to swap in your favorite candies or tweak the ingredients based on what you have on hand. Plus, they are so easy to whip up, you might find yourself making them every week!
Ingredient Rundown
- 1 cup unsalted butter, melted: This forms the rich base of your cookie bars.
- 1 large egg: Essential for binding the ingredients together.
- 1 cup light brown sugar, packed: Adds sweetness and a hint of caramel flavor.
- 1 tablespoon vanilla extract: Enhances the overall flavor profile.
- 1 cup all-purpose flour: The foundation that gives the bars structure.
- 18 Oreo Cookies, coarsely chopped: Brings in that classic Oreo crunch and taste.
- About 1/2 cup M&Ms: Feel free to use plain, peanut, or any other favorite candy for a pop of color and flavor.
Equipment at a Glance
- Mixing bowls: For combining your wet and dry ingredients.
- 9×13 inch baking pan: The perfect size for these cookie bars.
- Spatula: For mixing and spreading the batter evenly.
- Oven: Preheated to the right temperature to ensure even baking.
Loaded M&M Oreo Cookie Bars: Step-by-Step Guide

Step 1: Preheat Your Oven
Preheat your oven to 350°F (175°C) and grease your 9×13 inch baking pan or line it with parchment paper for easy removal.
Step 2: Mix Wet Ingredients
In a large mixing bowl, combine the melted butter, egg, light brown sugar, and vanilla extract. Whisk until smooth and well combined.
Step 3: Add Dry Ingredients
Gradually add the all-purpose flour to the wet mixture, stirring gently until just combined. Be careful not to overmix!
Step 4: Fold in the Goodies
Gently fold in the chopped Oreo cookies and M&Ms, ensuring they are evenly distributed throughout the batter.
Step 5: Spread the Batter
Pour the batter into the prepared baking pan and use a spatula to spread it evenly across the pan.
Step 6: Bake
Bake in the preheated oven for 20-25 minutes, or until the edges are golden brown and a toothpick inserted in the center comes out clean.
Step 7: Cool and Slice
Allow the bars to cool in the pan for about 10-15 minutes before transferring them to a wire rack to cool completely. Once cooled, slice into squares and enjoy!
Fit It to Your Goals

- Swap the Butter: Use coconut oil or a plant-based butter for a dairy-free version.
- Gluten-Free Option: Substitute all-purpose flour with a 1:1 gluten-free flour blend.
- Customize Your Candy: Replace M&Ms with your favorite chocolate or nuts.
- Reduce Sugar: Cut down the brown sugar for a less sweet option, or use a sugar substitute.
Notes from the Test Kitchen
These Loaded M&M Oreo Cookie Bars are best enjoyed fresh, but they can be stored for a few days. For the best texture, don’t overbake them; a slightly gooey center is ideal. You can also experiment with the mix-ins—try adding chopped nuts or other candies for a unique twist!
Meal Prep & Storage Notes
Store any leftover cookie bars in an airtight container at room temperature for up to 3 days. For longer storage, consider freezing the bars. Wrap them tightly in plastic wrap and place them in a freezer-safe container. They can last for up to 2 months in the freezer. Just thaw before serving for the best taste and texture.
Quick Questions
Can I make these cookie bars ahead of time?
Absolutely! You can prepare the batter a day in advance and bake it just before you’re ready to serve. They also store well, as mentioned above.
What if I don’t have M&Ms?
No problem! You can use any chopped candy you like, or even chocolate chips for a simpler approach. Get creative with your favorite treats!
Can I use different types of Oreos?
Definitely! The recipe is very flexible. Try using mint Oreos or any seasonal flavors to add a fun twist to your Loaded M&M Oreo Cookie Bars.
How do I know when they are done baking?
Check for golden edges and a slightly set center. A toothpick inserted into the center should come out with a few moist crumbs, but not wet batter.
One Pan, More Ideas
- Secret Ingredient Chocolate Chip Cookies: A twist on a classic cookie recipe.
- Fudgy Chocolate Pecan Pie: Perfect for those who love rich, decadent desserts.
- Maple Pecan Cheesecake Bars: A delightful combination of creamy cheesecake and nutty flavors.
Time to Try It
Now that you have the recipe for Loaded M&M Oreo Cookie Bars, it’s time to gather your ingredients and get baking! These cookie bars are sure to please everyone, from kids to adults. Don’t forget to take a moment to enjoy the process—baking is not just about the end result, but also about the joy of creating something delicious. Happy baking, and enjoy every bite of your sweet creation!
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Loaded M&M Oreo Cookie Bars
Ingredients
- 1 cup unsalted butter melted
- 1 large egg
- 1 cup light brown sugar packed
- 1 tablespoon vanilla extract
- 1 cup all-purpose flour
- 18 cookies Oreo Cookies coarsely chopped
- 1/2 cup M&Ms or any other favorite candy
Instructions
- Preheat your oven to 350°F (175°C) and grease your 9x13 inch baking pan or line it with parchment paper for easy removal.
- In a large mixing bowl, combine the melted butter, egg, light brown sugar, and vanilla extract. Whisk until smooth and well combined.
- Gradually add the all-purpose flour to the wet mixture, stirring gently until just combined. Be careful not to overmix!
- Gently fold in the chopped Oreo cookies and M&Ms, ensuring they are evenly distributed throughout the batter.
- Pour the batter into the prepared baking pan and use a spatula to spread it evenly across the pan.
- Bake in the preheated oven for 20-25 minutes, or until the edges are golden brown and a toothpick inserted in the center comes out clean.
- Allow the bars to cool in the pan for about 10-15 minutes before transferring them to a wire rack to cool completely. Once cooled, slice into squares and enjoy!
Equipment
- Mixing Bowls
- 9x13-inch Baking Pan
- Spatula
- Oven
Notes
- These bars are best enjoyed fresh but can be stored for a few days in an airtight container.
- For a dairy-free version, swap butter for coconut oil or plant-based butter.
- Experiment with different candies like chocolate chips or nuts for unique flavors.
