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These Cookie and Cream Brownies are about to change your life. I’m being 100% serious. They’re just that good. Not only are these Oreo brownies fast and simple to make, but they’re literally better than store bought brownies a million times over! 

square slice of brownies with white frosting and chocolate drizzle on top sitting on a teal cloth

Epic Cookies and Cream Brownies Recipe

Have you ever eaten a dessert and instantly knew you’d never forget it? For me, this is what these homemade brownies are like. It’s different from other brownie recipes because of the added cookies – and that’s one of the best parts! 

You can call them Oreo brownies, chocolate brownies, or “don’t miss or you’re going to be sorry” brownies as long as you make them! 

RIGHT??? See what I mean???

Why you’ll love these brownies

Back when I posted these Reese’s Brownies with Oreo Crust, I thought I’d outdone myself in the epic-holy-OMG-serious brownie business. But I was wrong. Oh, so wrong.

These Cookies ‘n Cream Brownies are extreme brownies, to the nth degree. Fudgy, dark chocolate brownie, Oreos, fluffy white frosting, MORE Oreos, and chocolate sauce.

square slice of brownies with white frosting and chocolate drizzle on top sitting on a teal cloth
Ingredients in extreme oreo brownies frosting

Ingredients in Cookies and Cream Brownies

  • Unsalted butter: Unsalted butter is key, and make sure it’s at room temperature. 
  • Bittersweet chocolate chips (or dark chocolate chips): Either is fine and depends on whatever you prefer. Just make sure to use a chocolate that isn’t overly sweet. 
  • Eggs: Important as the eggs bind the ingredients together and keep the brownies moist. 
  • Granulated sugar: Needed for the extra sweetness. 
  • Salt: Just a little bit of salt goes a long way. (if you happen to use salted butter, omit adding in this extra salt) 
  • Pure vanilla extract: Pure vanilla adds so much flavor! 
  • Cake flour: You have to have cake flour for this recipe—a MUST. 
  • Unsweetened cocoa powder (Dutch process or regular or Special Dark): Use whatever you’d like. 
  • Oreo Cookies: Don’t skimp and snack on the extras! 
6 photo collage showing steps for how to make brownies

How to make Extreme Brownies

So this recipe is a little more involved than my normal brownie recipes. There’s some sifting involved but that’s okay, it’s worth it. You have to let the brownies sit overnight, but you know that makes everything taste better (like cookie dough).

  • First you make the rich and fudgy brownie batter.
  • Add the brownie batter to the pan and top it with Oreos, then bake.
  • Then you make a fluffy white frosting that tastes like Oreo filling. The secret to the filling? Marshmallow fluff. Who knew?
  • Frost the brownies with the frosting and top with mini Oreos.
  • Make a delicious rich fudge sauce – homemade!
  • Drizzle the fudge all over the brownies.
square slice of brownies with white frosting and chocolate drizzle on top sitting on a teal cloth

Recipe Notes

  • In her book, Connie calls for Dutch-process cocoa and 60% cacao chocolate. Now, because I bake a lot, I know where to get that stuff, but I don’t usually stock it. I adapted the recipe using what I (and most regular bakers) have on hand. I used Hershey’s Special Dark chocolate chips AND cocoa powder. You can also use regular cocoa powder (not the special dark), and I believe some of the other brands of chocolate chips have darker than semi-sweet flavors. Check your local store.
  • Yes, you need cake flour. I’m sorry. Did you know you can make your own cake flour?
  • Typically, I don’t use Crisco (vegetable shortening) in my recipes. But, in the interest of sticking with the recipe, I used it and the frosting is amazing. I suggest buying the sticks of Crisco for easy portioning. (Who wants to clean that measuring cup??)
  • Because it’s September, the white chocolate covered Oreos are not in stores. Those are a seasonal product for the holidays, so if you see them, buy 2 boxes and use them instead of the regular Oreos. But regular work just fine…obviously. You could also try these with mint or peanut butter Oreos. Can you imagine??
  • These require a napkin and a fork. They can also serve as a meal. Holy cow. Did you LOOK at them?
square slice of brownies with white frosting and chocolate drizzle on top sitting on a teal cloth

Cookies ‘n Cream Extreme Brownies

4.67 from 6 votes
These brownies are extreme! They’re fudgy, dark, chocolatey, full of Oreos, and topped with a mouth-watering fluffy white frosting!
Prep Time 1 hour
Cook Time 35 minutes
Total Time 1 hour 35 minutes
Yield 36 brownies
Serving Size 1 brownie


For the Brownies

  • 1 cup (226g) unsalted butter
  • 1 ⅔ cups (227g) 60% bittersweet chocolate chips (or dark chocolate chips)
  • 4 large eggs
  • 2 cups (400g) granulated sugar
  • ¼ teaspoon salt
  • 1 ½ teaspoons pure vanilla extract
  • ¼ cup + 1 tablespoon cake flour
  • ¼ cup + 2 tablespoons (30g) unsweetened cocoa powder (Dutch process or regular or Special Dark)
  • 15 Oreo Cookies

For the Frosting

  • 8 tablespoons (95g) vegetable shortening
  • ¼ cup (57g) unsalted butter, softened
  • 1 cup (104g) marshmallow creme
  • 1 teaspoon pure vanilla extract
  • 1 teaspoon vanilla bean paste or another 2 teaspoons pure vanilla extract
  • cups (141g) powdered sugar
  • cups Mini Oreo Cookies (or more, for topping)


  • 2 tablespoons (28g) unsalted butter
  • 2 tablespoons (40g) light corn syrup
  • ½ cup (85g) semisweet chocolate chips
  • 2 teaspoons very hot water
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  • Preheat oven to 350°F. Line a 9×13” pan with foil and grease with butter or spray with cooking spray.
  • Cut the butter into 1-inch slices and place in a small saucepan. Melt over low heat and add the chocolate chips, stirring until the chocolate is melted and smooth. Turn off the burner but leave the pan on it (to stay warm).
  • Whisk the eggs in a large bowl. Add the sugar and salt and whisk until incorporated. Gradually whisk the chocolate mixture into the egg mixture. Whisk in the vanilla.
  • Place the flour and cocoa in sifter or a wire mesh strainer. Sift directly into the batter and stir with a spatula. Pour batter into prepared pan and spread until even. Place the 15 large Oreos evenly on top and press down lightly to cover with the batter.
  • Bake for 28-34 minutes until a toothpick inserted in the center comes out clean. Cool to room temperature on the counter, then cover and let sit overnight (you can also refrigerate it overnight).
  • Make the frosting: beat shortening and butter in a stand mixer with the paddle attached (or a hand mixer). Mix in marshmallow creme and vanilla. Slowly mix in powdered sugar. Spread frosting evenly over top of the brownies. Top evenly with mini Oreos.
  • Make the topping: melt the butter and corn syrup in a small saucepan. Turn off the heat and stir in the chocolate chips, then stir in the water to thin. Drizzle over the top of the frosting. Chill the frosted brownies for at least 1 hour until the frosting and topping sets. Remove from pan and slice into bars.

Recipe Video

Recipe Notes

This recipe is reprinted from Extreme Brownies by Connie Weiss.

Recipe Nutrition

Serving: 1brownie | Calories: 256kcal | Carbohydrates: 30g | Protein: 2g | Fat: 15g | Saturated Fat: 9g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 4g | Trans Fat: 1g | Cholesterol: 37mg | Sodium: 54mg | Potassium: 98mg | Fiber: 1g | Sugar: 24g | Vitamin A: 245IU | Vitamin C: 0.04mg | Calcium: 34mg | Iron: 1mg
Nutritional information not guaranteed to be accurate
Course Dessert
Cuisine American

Favorite Brownie Recipes

This recipe is from my new favorite cookbook, Extreme Brownies by Connie Weis. I received this book a few weeks ago and I’ve been drooling over the recipes ever since. (Remember the caramel peanut butter cookie bars last week? That Caramel????)

Dorothy Kern

Welcome to Crazy for Crust, where I share recipes that are sometimes crazy, often with a crust, and always served with a slice of life.

4.67 from 6 votes (4 ratings without comment)

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  1. This is my college aged daughters favorite dessert! She always requests these when I’m making something just for her! There is no other dessert that compares to these. It’s the creamy white middle I think that makes them special. Try it

  2. Made these for my son’s varsity baseball banquet and they were gone in a second. Every time those boys are over they request this. It is sweet but they love it.