Introduction

This rich and decadent Chocolate Oreo Cake combines classic chocolate layers with creamy Oreo buttercream and a luscious chocolate ganache. It’s a show-stopping dessert perfect for celebrations or anytime you crave a sweet treat.

The image shows a tall round cake covered in light gray frosting with small dark specks, giving it a cookies-and-cream look. Around the top edge, there are twelve evenly spaced swirls of the same frosting, each set with a whole Oreo cookie standing upright between the swirls. A thick layer of shiny dark chocolate glaze drips down the sides from the top edge, creating smooth, slightly uneven drips. The very top of the cake has a smooth layer of glossy chocolate with faint swirl designs. The cake sits on a white marbled texture surface, surrounded by crushed Oreos and some Oreo halves at the base. photo taken with an iphone --ar 4:5 --v 7

Ingredients

2 cups (260g) all-purpose flour
2 cups (414g) sugar
¾ cup (85g) natural unsweetened cocoa powder
2 teaspoons baking soda
1 teaspoon salt
2 large eggs
1 cup (240ml) milk
1 cup (240ml) vegetable oil
1 ½ teaspoons vanilla extract
1 cup (240ml) boiling water
3 cups (672g) unsalted butter, room temperature
8-9 cups (920g-1035g) powdered sugar
3 cups (414g) Oreo crumbs (about 33 Oreos)
1 teaspoon vanilla extract (for frosting)
6-7 tablespoons (90ml-105ml) heavy whipping cream
Pinch of salt
12 Oreos, chopped
6 ounces (1 cup | 169g) semi-sweet chocolate chips
½ cup (120ml) heavy whipping cream (for ganache)
Oreos (optional, for decoration)

Instructions

Step 1: Prepare three 8-inch cake pans by lining the bottoms with parchment paper circles and greasing the sides.
Step 2: In a large bowl, whisk together the flour, sugar, cocoa powder, baking soda, and salt.
Step 3: Add eggs, milk, and vegetable oil to the dry ingredients and mix until smooth.
Step 4: Stir vanilla extract into the boiling water, then add the hot water mixture to the batter and mix well.
Step 5: Divide the batter evenly among the prepared pans. Bake at 300°F (150°C) for 30-33 minutes, or until a toothpick inserted near the center comes out with a few moist crumbs.
Step 6: Let the cakes cool in the pans for about 10 minutes, then transfer to wire racks to cool completely.
Step 7: To make the frosting, beat the butter until smooth and creamy.
Step 8: Gradually add 4 cups of powdered sugar, mixing until smooth.
Step 9: Add vanilla extract, Oreo crumbs, and a pinch of salt, then mix until smooth.
Step 10: Add 4 to 5 more cups of powdered sugar and beat until combined. Add heavy cream as needed to reach a smooth, spreadable consistency.
Step 11: Reserve about 3 ½ cups of the Oreo buttercream and fold in the chopped Oreos to create the filling. Set both the chopped Oreo filling and remaining buttercream aside.
Step 12: Once the cakes have cooled, trim off any domed tops with a serrated knife for even layers.
Step 13: Place one cake layer on a serving plate and spread half of the chopped Oreo filling evenly over it.
Step 14: Add the second cake layer and spread the remaining chopped Oreo filling evenly on top.
Step 15: Place the final cake layer on top, then frost the entire outside of the cake with the remaining Oreo buttercream.
Step 16: For the ganache, place chocolate chips in a medium bowl.
Step 17: Heat the ½ cup heavy whipping cream until it just begins to boil, then pour over the chocolate chips. Let it sit for 2-3 minutes, then whisk until smooth.
Step 18: Drizzle the ganache around the edges of the cake and pour the rest on top, spreading evenly.
Step 19: Let the ganache set slightly, then pipe the remaining frosting around the top edge. Decorate with Oreos placed between each swirl.
Step 20: Sprinkle a few Oreo crumbs on top if desired, then serve. For best flavor, keep the cake well covered for 3-4 days.

Tips & Variations

Use room temperature ingredients for smoother batter and frosting.
Chilling the frosting before assembling can help with easier spreading and piping.
For a more intense chocolate flavor, add a teaspoon of espresso powder to the batter.
Substitute half the vegetable oil with melted butter for a richer cake.
Decorate with extra Oreos or crushed cookie pieces for added texture and style.

Storage

Store the cake covered tightly at room temperature for up to 2 days or in the refrigerator for 3-4 days. Before serving, let refrigerated cake come to room temperature for the best texture. Ganache and frosting will firm up when chilled but soften nicely once warmed slightly.

How to Serve

A slice of three-layer chocolate cake sits on a white plate with a slightly textured metal look, placed on a white marbled surface with a turquoise cloth underneath. The bottom, middle, and top layers are dark, moist chocolate cake with two thick layers of lighter chocolate cream containing small cookie chunks between them. The cake is covered in a light chocolate frosting with a smooth texture and chocolate drizzle on top edges. In the background, the remaining cake shows similar decoration with Oreo cookies around the edge, and a bowl of Oreo cookies is slightly visible. A silver fork rests beside the slice, and a woman's hand is gently holding the piece from the side. Photo taken with an iphone --ar 4:5 --v 7

Serve this delicious recipe with your favorite sides.

FAQs

Can I make this cake dairy-free?

You can substitute dairy ingredients with plant-based alternatives: use dairy-free butter and milk substitutes, and ensure the Oreos used are dairy-free, as most original Oreos are.

How do I prevent the cake from drying out?

Cover the cake well with plastic wrap or store in an airtight container. Adding a layer of simple syrup between layers can also keep the cake moist.