Oreo Brownies

This post may contain affiliate links. Please read my disclosure policy.

Oreo brownies (with an option to add in some M&Ms!)

FOLLOW ALONG! Subscribe to my newsletter and follow along on Facebook, Pinterest and Instagram for the latest updates, recipes and content.

Oreo Brownies

5 from 4 votes
Print Recipe

Oreo Brownies

5 from 4 votes
Course Dessert
Cuisine American
Keyword M&M Brownie Bars
Prep Time 10 minutes
Cook Time 20 hours
Total Time 20 hours 10 minutes
Servings 1 8x8 pan
Calories 293kcal
Cost $3.45


  • 1 box brownie mix + ingredients called for
  • 12 chocolate sandwich cookies
  • 2/3 cup M&M's separated


  • Line an 8 x 8 pan with parchment paper and then lightly spray the paper with nonstick spray. This will help in easy removal of the brownies.
  • Preheat the oven according to brownie mix instructions.
  • In a large bowl, prepare the brownies according to the brownie mix instructions.
  • Coarsely chop or crush the Oreos. You can crush or chop them as large or as fine as you like. I like some bigger chunks in these brownies.
  • Mix the chopped oreos and 1/3 cup of the M&M's into the batter.
  • The batter will be thick! Pour the batter into the prepared pan and sprinkle the remaining 1/3 cup of M&M's evenly over the top of the brownies.
  • Bake according to the directions for an 8 x 8 pan. Ever so slightly under-baking these brownies makes them ultra fudgy and keeps the cookies softer throughout the batch.

Nutrition Facts

Calories: 293kcal


I love hearing from you when you've made one of my recipes! Tag me on Instagram at @ChelseasMessyApron or leave me a comment below.



How to Make Mealtime Hassle Free!

5 secrets to easy, fast and delicious dinners.

  • This field is for validation purposes and should be left unchanged.

Leave a Comment:

Your email address will not be published. Required fields are marked *

Recipe Rating


  1. I don’t even know where to start, both these desserts look amazing, Chelsea! I absolutely adore the mini cookie ice cream cakes, especially, what a creative idea! Easy and delicious, love it 🙂

  2. Those little cakes! Adorable and they sound absolutely delicious! And I must admit I love the picture of the doggie 🙂 haha Have a great long weekend!!

  3. 5 stars
    I love your ice cream cookie cakes! Some cakes are dessert and some say PARTY! and these are definitely the latter. 🙂

  4. concerning the brownie mix with the packet of chocolate syrup … i agree. but i have my own little trick – i buy whatever brand mix is on sale, and i have a can of hershey’s syrup that i use to add a tablespoon or two to brownie mix. makes even store brand mix taste oh-so-fudgey!

    1. I haven’t ever tried this recipe in a 9 x 13 pan so I can’t say for sure, but I assume just completely doubling all of the ingredients would be perfect!

Never Miss a Recipe

  • This field is for validation purposes and should be left unchanged.