If you love Oreos and brownies, this one's for you.
These Oreo brownies start with a boxed brownie mix, then get mixed with crushed Oreos for fudgy brownies with cookies in every bite.
They're easy to make, don't need special ingredients, and are great for parties, bake sales, or when you just want a quick chocolate treat.
This is one of my favorite ways to make boxed brownies when I need something fast.
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Ingredients You'll Need
Brownie base ingredients
Oreos
Notes and Substitutions
- Brownie mix: Use a regular 18-ounce boxed brownie mix. Any brand works - just follow the box directions.
- Water: You can swap with milk, buttermilk, or coffee to make the brownies richer and more chocolatey.
- Instant coffee: Optional, but it boosts the chocolate flavor and cuts the sweetness a bit.
Tips for Best Brownies
- Let the eggs come to room temperature, then lightly beat them before adding to the batter.
- Grease the pan and line it with parchment so the brownies don't stick.
- Start checking a couple minutes early so you don't overbake. The toothpick should have a few crumbs on it.
- Let the brownies cool before cutting. Chill them in the fridge first so they slice much nicer.
How to Make Oreo Brownies (Step-by-Step)
Step 1: Make the brownie batter as directed in the package. Add most of the Oreo cookie pieces (about 8 pieces) into the batter and mix.
Step 2: Spread the batter in an 8x8-inch pan and add the rest of the Oreos on top.
Step 3: Bake according to the box directions. Let the brownies set for at least an hour in the fridge before cutting.
Storage
Keep leftover brownies in a covered container in the fridge for up to 5 days. Let them sit out for a few minutes before eating, or warm them slightly if you like softer brownies.
To freeze, wrap each brownie and place in a freezer bag. They'll keep for up to 2 months. Thaw in the fridge or on the counter.
Recipe FAQs
Yes. Any regular boxed brownie mix works. Just follow the directions on the box.
The edges should look set, and a toothpick in the center should come out with a few crumbs, not wet batter.
Yes. You can make them a day ahead. Keep them covered in the fridge, then let them sit out for a few minutes before serving.
Yes. Double all the ingredients and bake in a 9×13-inch pan. The brownies are done when the edges are set and the center is no longer wet.
Yes. Wrap each brownie and store in a freezer bag for up to 2 months. Thaw in the fridge or on the counter.
Easy Brownie Mix Upgrades to Try Next
If you like easy brownie mix recipes, here are a few more you might enjoy:
More Tips for Boxed Brownies
If you're baking with brownie mix, this guide has common questions and easy tips to help your brownies turn out better.
Other Cakes and Baked Desserts You May Like
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📖 Recipe
Easy Oreo Brownies (From Brownie Mix)
Equipment
- 8x8-inch pan
Ingredients
- 1 box brownie mix about 18 ounces
- Eggs room temperature and lightly beaten (see box for amount)
- Water sub: milk, buttermilk, or coffee (see box for amount)
- Neutral oil (see box for amount)
- ½ teaspoon instant coffee or ¼ teaspoon espresso powder (optional)
- 12 Oreo cookies cut into small pieces
Instructions
- Mix the brownie batter like the box says. Add most of the Oreo pieces (about 8 cookies) and mix.
- Spread the batter in an 8×8-inch pan, then add the rest of the Oreo pieces on top.
- Bake according to the box directions.
- Let cool before cutting.
Notes
- Any 18-oz boxed brownie mix works.
- Swap water with milk, buttermilk, or coffee for better flavor.
- Instant coffee is optional, but makes the chocolate taste stronger.
- Keep leftovers in a covered container in the fridge for up to 5 days.
- To freeze, wrap each brownie and store in a freezer bag for up to 2 months.
- Use room-temp eggs; lightly beat before adding.
- Grease pan and line with parchment.
- Check early - toothpick should have a few crumbs.
- Cool before cutting (chill first for cleaner slices).
Nicolas says
This looks easy enough. I’m definitely making this one. Thanks for the idea.
Nora Rey says
You're very welcome! I'm thrilled to hear that you're excited to give it a try! 🤗 I'm sure you'll do an awesome job, and it's going to be delicious!