Ingredients
Cake
- 2 1/2 cups cake flour
- 1/2 teaspoon kosher salt
- 1 Tablespoon baking powder
- 3/4 cup unsalted butter, softened to room temperature
- 1 3/4 cups granulated sugar
- 3 large eggs
- 2 large egg whites
- 1 Tablespoon pure vanilla extract
- 3/4 cup buttermilk
- 14 Oreo Cookies, broken into pieces
Frosting
- 1 cup unsalted butter, softened to room temperature
- 4 cups powdered sugar
- 1/2 cup heavy whipping cream
- 2 teaspoons pure vanilla extract
- 10 Oreo Cookies, crushed to crumbs
Instructions
- Preheat and Prepare Pan: Preheat the oven to 350 degrees F (175 degrees C). Spray a 13×9-inch baking dish with baking spray to prevent sticking and set aside.
- Combine Dry Ingredients: In a bowl, whisk together the cake flour, kosher salt, and baking powder until evenly mixed. Set this mixture aside.
- Cream Butter and Sugar: In a large mixing bowl, beat the softened butter with granulated sugar for a couple of minutes until the mixture is light and fluffy. Make sure to scrape down the sides of the bowl as needed to incorporate all ingredients evenly.
- Add Eggs and Vanilla: Add the eggs, egg whites, and pure vanilla extract to the butter-sugar mixture. Beat everything together for about 2 minutes until fully combined and slightly aerated.
- Incorporate Dry Ingredients and Buttermilk: Alternately add the dry ingredient mixture and buttermilk to the wet mixture in about three additions each. Begin and end with the dry ingredients. After the final addition of buttermilk, beat the batter for one minute to ensure smoothness.
- Fold in Oreo Pieces: Gently fold the broken Oreo cookie pieces into the batter, making sure they are evenly distributed without overmixing.
- Bake the Cake: Pour the batter into the prepared baking dish and spread evenly. Bake for 32 to 36 minutes, or until a toothpick inserted into the center comes out clean. Remove from the oven and let the cake cool completely in the pan.
- Prepare the Frosting: In a mixing bowl, beat the softened butter with powdered sugar for 2 to 3 minutes until well combined. Add the heavy whipping cream and pure vanilla extract and continue beating for another 2 to 3 minutes until the frosting becomes light and fluffy.
- Add Crushed Oreo Crumbs to Frosting: Fold in the crushed Oreo cookie crumbs gently into the frosting to maintain a textured consistency.
- Frost and Serve: Once the cake is completely cooled, spread the Oreo frosting evenly over the top. Slice into 20 servings and enjoy!
Notes
- Ensure the cake is completely cooled before frosting to prevent melting.
- You can use regular Oreos or any Oreo variety depending on your flavor preference.
- If you do not have buttermilk, use 3/4 cup milk mixed with 1 tablespoon vinegar or lemon juice, let it sit for 5 minutes before using.
- For extra texture, you can sprinkle additional crushed Oreos on top of the frosting before serving.
- Store leftovers covered in the refrigerator to keep the frosting fresh.
- Prep Time: 15 minutes
- Cook Time: 35 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
- Diet: Vegetarian