oreo cake cut into pieces in glass 9x13 inch pan

This easy oreo cake recipe is made in a 9×13 inch pan and is moist, fluffy, and loaded with oreos for the ultimate oreo birthday cake! There’s nothing better than a single layer cookies and cream cake topped with oreo frosting! No special equipment or skills required for this oreo sheet cake. 

Ryan sent me a text around 9am saying how his co-workers were commenting how much they liked this oreo cake. I sent a text back saying.. cake at 9am? And he responded with.. it’s already gone!

There you have it, this cookies and cream sheet cake is a crowd favorite!

This recipe is a take on our cookies and cream cupcakes – I doubled the recipe and made it in a 9×13 inch pan. You know I love a good layered cake, but layer cakes aren’t only a time commitment, there can be a bit of a learning curve in the frosting process.

So I wanted to share this recipe as a 9×13 inch cake so anyone can make it! No special skills required.

slice of oreo pan on metal spatula

I’m intentionally adding more “sheet cake” recipes to our collection. I think of a sheet cake as any cake that is made in a single pan – that could be an 8×8, 9×13, or 10.5×15.5 inch pan.

Sheet cake recipes are easy and quick, something you could make and frost in under 2 hours. Plus, a lot of that time is not active time, it includes the time the cake needs to bake and cool.

What’s the Difference Between Oreo Cake and Cookies and Cream Cake?

Nothing! They are the same cake – both use oreo chocolate wafer cookies. Oreo is simply a brand name that popularized the cookies and cream cookie we all know and love. 

oreo cake cut into pieces in glass 9x13 inch pan

Cookies and Cream Cake Ingredients

  • unsalted butter: makes the cake tender and helps with leavening 
  • granulated sugar: adds sweetness and flavor
  • egg whites: binds the cake together by providing structure 
  • sour cream: adds moisture and creaminess
  • milk: add moisture 
  • vanilla extract: adds flavor
  • all purpose flour: flour is necessary to build structure
  • baking soda: helps to leaven and lift the batter, reacts with the sour cream
  • salt: just a pinch to balance the sweetness and enhances the other flavors of the cake
  • crushed oreos: necessary for a birthday oreo cake! 

Cookies and Cream Frosting

  • unsalted butter: provides structure for the frosting 
  • vanilla extract: adds flavor
  • powdered sugar: adds sweetness, flavor and structure 
  • finely blended oreos: adds that cookies and cream flavor we all love

How to Make Oreo Cake

  1. In a mixing bowl combine the butter and sugar, beat using an electric mixer, 1-2 minutes until fluffy. 
  2. Add in the egg whites, mixing with a spatula. 
  3. Add in the sour cream, milk, and vanilla extract. Beat lightly with the electric mixer. 
  4. In a separate mixing bowl combine the flour, baking soda, and salt. Gradually add the flour mixture to the wet ingredients a few spoonfuls at a time. 
  5. Add in the crushed oreos. Mix until just incorporated. Pour the batter into the prepared pan and spread evenly. Bake for 40-44 minutes. 
a slice of cookies and cream oreo cake on white plate

How Long Does it Take to Make Oreo Cake?

  • 10 minutes to prep the batter
  • 45 minutes to bake the cake
  • 1 hour, at least, to cool the cake
  • 15 minutes to make the oreo frosting and frost the cake

Over the Top Oreo Cake

For an extra fancy presentation, after I evenly spread the cookies and cream frosting over the cake, I lightly sprinkled oreo crumbs over the cake. Then I cut the cake into squares and in the center of each piece I added a buttercream swirl and a mini oreo.

slice of oreo cake with oreo frosting on metal spatula

Tips for Making Cake

  • Properly measure the all purpose flour using the spoon and sweep method.
  • Combine the dry ingredients into the wet ingredients just until they are combined. Over mixing could lead to dry, dense cake.
  • In the oreo frosting recipe, it calls for 1 cup of finely blended oreos. I put oreos into my blender and blended them into “oreo flour”.
  • To help create clean cut lines when cutting the cake, after you frost the cake put it in the fridge for 30 minutes. This will help the buttercream harden so it isn’t as messy when you get the cake. I also wipe my knife clean after each cut. That really helps with clean cut lines.
  • Store this cake covered on the counter.

More Oreo Desserts

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For a step-by-step of how to make this cookies and cream cake recipe, watch this short video:
Oreo Cake

Oreo Cake

Yield: 9x13 inch pan
Prep Time: 10 minutes
Cook Time: 45 minutes
Additional Time: 1 hour
Total Time: 1 hour 55 minutes

This easy oreo cake recipe is made in a 9x13 inch pan and is moist, fluffy, and loaded with oreos for the ultimate oreo birthday cake! There’s nothing better than a single layer cookies and cream cake topped with oreo frosting! No special equipment or skills required for this oreo sheet cake.

Ingredients

Oreo Cake

  • 2 sticks (1 cup) unsalted butter, room temperature
  • 1 & 3/4 cup granulated sugar
  • 4 egg whites
  • 1 & 1/2 cup sour cream
  • 1/2 cup milk (I used skim)
  • 1 tsp vanilla extract
  • 2 & 1/2 cup all purpose flour
  • 1 tsp baking soda
  • 1/2 tsp salt
  • 1 cup crushed oreos

Oreo Frosting

  • 3 sticks (1 & 1/2 cups) unsalted butter, room temperature
  • 1 tsp vanilla extract
  • 3-4 cups powdered sugar
  • 1 cup finely blended oreos

To top the cake

  • Oreo crumbs and mini oreos

Instructions

Oreo CAKE

  1. Preheat the oven to 350º F. Spray a 9x13 inch pan with non-stick cooking spray.
  2. In a mixing bowl combine the butter and sugar, beat using an electric mixer, 1-2 minutes until fluffy. Add in the egg whites, mixing with a spatula. Add in the sour cream, milk, and vanilla extract. Beat lightly with the electric mixer. In a separate mixing bowl combine the flour, baking soda, and salt. Gradually add the flour mixture to the wet ingredients a few spoonfuls at a time. Add in the crushed oreos. Mix until just incorporated. Pour the batter into the pan and spread evenly.
  3. Bake for 40-44 minutes or until a few moist crumbs remain on a toothpick when inserted into the center. Allow the cake to cool completely before adding the frosting. I baked my cake in a glass pan, which is slower to heat up, meaning the baking time for a glass pan is longer than it would be for a metal pan. Those of you who have made this recipe in a metal pan are reported that 30 minutes was a good bake time for a metal pan. Remember, every oven and pan is different!

Oreo Frosting

  1. In a mixing bowl, beat the butter with an electric mixer until fluffy. Add in the vanilla extract. Begin to add the powdered sugar, about 1 cup at a time, mixing by hand. Continue adding powdered sugar until the frosting no longer looks wet and tastes good to you. Add in the finely blended oreos (I like to call it "oreo flour"). Then I use my electric mixer one last time to make sure the powdered sugar is really incorporated and ready to go. If the frosting becomes too thick, add a dash of milk or heavy cream.

TO ASSEMBLE

  1. Spread the buttercream on top of the cake. Be sure to reserve some buttercream for swirls to top the cake if you’d like.
  2. For an extra fancy presentation, after I evenly spread the cookies & cream buttercream over the cake, I lightly sprinkled oreo crumbs on the top. Then I cut the cake into squares and in the center of each piece, I added a buttercream swirl and a mini oreo.

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