Christmas Oreo Brownies

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Last updated on February 3rd, 2026 at 08:33 pm

If you’re looking for a festive treat that’s simple to make but looks like it came straight from a holiday-themed bakery, these Christmas Oreo Brownies are perfect. With fudgy brownie mix, crunchy Oreo pieces, and pops of red and green M&Ms, they’re rich, chewy, and full of holiday cheer. They’re one of the best fun Christmas desserts to add to your party table or cookie tray, and they’ll quickly become a go-to when you need easy Christmas desserts that still feel special.

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Ingredients for Christmas Oreo Brownies

Here’s everything you’ll need to make these cute Christmas desserts:

1 box brownie mix
Eggs, oil, and water as called for on the box for your brownie mix
12-15 Oreos, roughly chopped
1 cup red and green M&Ms

How to Make Christmas Oreo Brownies

1. Prepare your pan.
Start by preheating your oven to the temperature listed on your brownie mix box. Spray a 9×13-inch pan with cooking spray or line it with parchment paper for easy removal.
2. Mix the brownies.
In a large bowl, prepare your brownie batter according to the instructions on the box. You can use whatever mix you prefer; fudgy or chewy both work great here.
prepared brownie batter

3. Add the mix-ins.
Gently fold in most of the chopped Oreos red and green M&Ms, but save a decent amount to sprinkle on top later for a fun, festive pop.

4. Spread and bake (partway). Pour the batter into the prepared pan and smooth the top. Pour the batter into the prepared pan and smooth the top. Bake for about 15 minutes, or for about ¾ of the time your box mix tells you to. For me, it said 21 minutes, so that was around 15 minutes.
brownie batter in a 9x13 baking pan

5. Add toppings. Remove the pan from the oven and sprinkle the reserved Oreos and M&Ms into the top of the brownies. This step keeps the toppings visible and prevents them from sinking.

6. Finish baking. You know they’re done when you stick in a toothpick in the middle and it comes out with a couple crumbs (but not dripping in raw batter).
oreos and M&Ms sprinkled on parbaked brownies

7. Cool and cut.
Let the brownies cool completely in the pan before cutting them into squares. For the cleanest slices, chill the brownies in the fridge for about 30 minutes before cutting.

Pro Tips for Christmas Oreo Brownies

Line your pan with parchment paper so you can lift the brownies out easily for slicing; it makes them look cleaner and picture-perfect.
Don’t overbake. Brownies continue to set as they cool, so it’s better to pull them out when they’re slightly fudgy rather than dry. Now, make sure they’re fully baked too! I found that I actually had to bake mine for about 5 minutes longer than the box mix said I would, but everyone’s oven is different.
Parbaking before adding toppings keeps your Oreos and M&Ms from sinking into the batter and disappearing. Definitely lean towards parbaking to like three quarters of the way done. I normally try to do about halfway done and then sprinkle on my toppings. However, I found that with these brownies, if I did that the toppings I sprinkled on top had already sunk below the surface by the time the brownies were done.
If you don’t have all red and green M&M’s, put the other colors in the batter immediately and save the red and green ones for the top. No one will know the other M&Ms are hiding in the middle and you can still have a cute Christmas-themed treat.

FAQs

Can I use a homemade brownie recipe instead of a box mix?
Absolutely! I love a boxed mix for convenience, but if you have a homemade brownie recipe you love, go ahead and use it. Just add in the Oreos and M&Ms the same way.

Do the M&Ms melt in the oven?
Some will crack a little in the heat, but the ones in the middle of your brownies will be fine. Definitely sprinkles some extra M&Ms on top when your brownies are mostly done so they don’t crack.

Can I make these brownies ahead of time?
Yes! These brownies keep well at room temperature in an airtight container for up to 3 days. You can also freeze them if you wrap tightly in plastic wrap, then in foil, and store for up to 2 months. Thaw at room temperature before serving.

How do I know when the brownies are done baking?

Check with a toothpick inserted in the center—if it comes out with a few moist crumbs (not raw batter), they’re ready. Be wary of the time your box mix says to bake for! At least in my experience, I had to bake these a lot longer than I was expecting, but I’m sure different mixes and different ovens give different results.

Can I make these in a smaller pan?

For sure! Just make sure you adjust your baking time. If you use an 8×8 or 9×9 pan, you’ll have to bake for longer. That also means that you should parbake your brownies for longer before sprinkling extra things on top.

These Christmas Oreo Brownies are everything I love about holiday baking: easy, festive, and so delicious. They’re rich, chewy, and packed with crunchy Oreos and colorful candies, which makes them one of my favorite fun Christmas desserts to bring to parties or wrap up as holiday treats for friends. If you’re looking for easy Christmas desserts that still feel special, or if you just want cute Christmas desserts that don’t take all day to make, this recipe is the perfect fit. Give them a try, and I promise they’ll become a staple in your holiday baking lineup!