Ingredients
For the Cookie Cake
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1 ¾ cups (228g) all-purpose flour
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½ tsp baking soda
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½ tsp salt
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¾ cup (168g) unsalted butter, room temperature
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¾ cup (155g) granulated sugar
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¼ cup (56g) packed light brown sugar
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1 large egg
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1 tsp vanilla extract
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12 Oreo cookies (6 chopped, 6 crushed into crumbs)
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½ cup semi-sweet chocolate chips
For the Oreo Buttercream
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½ cup (112g) unsalted butter, room temperature
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2 cups (230g) powdered sugar
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½ tsp vanilla extract
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½ cup (67g) Oreo crumbs (about 6 Oreos)
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1–2 tbsp heavy cream
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Additional Oreos (cut in half) for topping
Instructions
Step 1: Prepare Your Pan & Oven
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Preheat oven to 350°F (180°C).
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Line the bottom of a 9-inch round cake pan with parchment paper and spray the sides with nonstick spray.
Step 2: Mix Dry Ingredients
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In a medium bowl, whisk together flour, baking soda, and salt. Set aside.
Step 3: Cream Butter & Sugars
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In a large bowl, beat butter, sugar, and brown sugar on medium speed for 2–3 minutes, until light and fluffy.
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Add egg and vanilla; mix until combined.
Step 4: Combine Wet & Dry
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Gradually mix in the dry ingredients just until no streaks of flour remain. Do not overmix.
Step 5: Add Oreos & Chocolate Chips
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Fold in chopped Oreos, Oreo crumbs, and chocolate chips.
Step 6: Bake
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Press dough evenly into the prepared cake pan. Press a few extra chocolate chips on top if desired.
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Bake for 18–20 minutes, or until edges are lightly golden and center is set.
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Cool completely in the pan before decorating.
Step 7: Make the Buttercream
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Beat butter until creamy.
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Add 1 cup powdered sugar and beat until smooth.
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Add vanilla, Oreo crumbs, and 1 tbsp heavy cream. Beat again.
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Add remaining sugar. Adjust consistency with more cream if needed.
Step 8: Decorate
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Pipe buttercream swirls around the edge using a star tip.
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Place half Oreos between swirls. Serve or refrigerate (bring to room temp before serving).
Notes
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Don’t overbake—edges should be golden, center slightly soft.
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Store in an airtight container for up to 5 days (refrigerate after 24 hours).
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You can freeze baked cake (unfrosted) for up to 2 months.
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Use flavored Oreos (e.g., mint or golden) for fun variations.
- Prep Time: 15 minutes
- Cook Time: 20 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
- Diet: Vegetarian