This Chocolate Oreo Cake is to die for. Three layers of moist chocolate cake are filled and frosted with chocolaty, Oreo-packed buttercream, plus more Oreos are layered between the cake layers. It’s an Oreo lover’s dream.
What You’ll Need
Here is a list of ingredients you will need to make this decadent, Oreo-filled chocolate layer cake. Don’t forget to scroll to the recipe card below for exact measurements.
Chocolate cake
- All-purpose flour – Feel free to use your favorite 1:1 gluten-free substitute instead.
- Sugar
- Natural unsweetened cocoa powder – You can use dutch processed cocoa powder for a more bitter chocolate flavor.
- Baking soda – For the optimal rise and cake texture.
- Salt – For flavor. Don’t leave it out.
- Large eggs – It is best if the eggs are at room temperature. They will incorporate into the batter more easily, helping to prevent over-mixing.
- Milk – For more moisture and fat.
- Vegetable oil – For a super moist cake.
- Vanilla extract – For a little extra flavor.
- Boiling water – The hot water will help the flavors in the cocoa powder “bloom”, yielding a more powerful chocolate flavor.
Oreo buttercream
- Butter – The butter should be at room temperature.
- Powdered sugar – For volume and consistency.
- Oreo crumbs – To flavor the buttercream. I like to put my Oreos in a food processor and grind into crumbs.
- Vanilla extract – Also for flavor.
- Heavy cream – To give the frosting creaminess and the best consistency.
- Oreos
Chocolate ganache
- Semi-sweet chocolate chips
- Heavy whipping cream
- Oreos
How to Make Chocolate Oreo Cake
Cake. Buttercream. Ganache. Just three simple components and you’ll be ready to assemble one of the best layer cakes on the planet. Here’s how to do it. Make sure to scroll to the recipe card below for more detailed instructions.
Chocolate cake
- Prep. Preheat the oven to 300 degrees F, line the bottom of three 8-inch cake pans with parchment paper circles, and grease the sides.
- Make the cake batter. Whisk together the dry ingredients. Add eggs, milk, and vegetable oil and mix to combine. Add vanilla to the boiling water and mix into the batter.
- Bake. Divide batter between the three cake pans and bake for 30-33 minutes. Allow the cakes to cool for 5-10 minutes before turning them out onto a cooling rack to cool completely.
Oreo buttercream
- Beat the butter until smooth.
- Mix in half of the powdered sugar followed by the vanilla and Oreo crumbs. Mix in the rest of the powdered sugar. Slowly mix in the heavy cream until you get a smooth consistency.
- Set aside 3 1/2 cups of the buttercream and add chopped Oreos to the rest.
To assemble
- Flatten the cakes. Use a serrated knife to remove the cake domes.
- Stack and fill. Place first layer of cake on cake plate and spread half of the icing with chopped Oreos on top in an even layer. Repeat with the second cake and the second half of the icing with Oreos. Top with the last cake layer.
- Frost the outside of the cake with the remaining frosting.
- Make the chocolate ganache. Heat the heavy whipping cream until it begins to boil. Pour it over the chocolate chips. Allow it to sit for 2-3 minutes and whisk until smooth.
- Finish the cake. Drizzle the chocolate ganache around the edge of the cake and spread the remainder over the top. Allow the ganache to firm up before piping the remainder of the frosting around the top edge of the cake. Add Oreos between swirls.
Can This Chocolate Layer Cake Be Prepared in Advance?
Yes! You can prepare all of the elements for this cake (aside from the ganache) in advance. Bake the cakes, allow them to cool, and store them in an air-tight container or cake carrier (or wrap them in clear wrap) until you are ready to assemble the cake. You can also make the buttercream a day or two in advance so long as you store it in an airtight container in the refrigerator.
When you are ready to enjoy this delicious dessert, bring your buttercream to room temperature (it’ll be very hard straight out of the fridge). Then all you have to do is stack, fill, frost, and decorate the cake.
Ingredients
Chocolate cake
- 2 cups (260g) all-purpose flour (measured properly)
- 2 cups (414g) sugar
- 3/4 cup (85g) natural unsweetened cocoa powder
- 2 tsp baking soda
- 1 tsp salt
- 2 large eggs
- 1 cup (240ml) milk
- 1 cup (240ml) vegetable oil
- 1 1/2 tsp vanilla extract
- 1 cup (240ml) boiling water
Oreo buttercream
- 3 cups (672g) unsalted butter, room temperature
- 8–9 cups (920g-1035g) powdered sugar
- 3 cups (414g) Oreo crumbs (about 33 Oreos)
- 1 tsp vanilla extract
- 6–7 tbsp (90ml-105ml) heavy cream
- pinch of salt
- 12 Oreos, chopped
Chocolate ganache
- 6 oz (1 cup | 169g) semi-sweet chocolate chips
- 1/2 cup (120ml) heavy whipping cream
- Oreos, optional
Instructions
- Prepare three 8 inch cake pans with parchment paper circles in the bottom, and grease the sides.
- Add all dry ingredients to a large bowl and whisk together.
- Add eggs, milk and vegetable oil to the dry ingredients and mix well.
- Add vanilla to boiling water and add to mixture. Mix well.
- Divide batter between three cakes pans and bake at 300 degrees for about 30-33 minutes, or until a toothpick comes out with a few crumbs.
- Remove cakes from oven and allow to cool for about 10 minutes, then remove to cooling racks to cool completely.
- Make icing while cakes cool. Beat together butter until smooth.
- Slowly add 4 cups of powdered sugar and mix until smooth.
- Add vanilla, Oreo crumbs and salt and mix until smooth.
- Add another 4-5 cups of powdered sugar and mix until smooth. Add heavy cream, as needed, until you get a smooth consistency.
- Set aside about 3 1/2 cups of icing for the filling inside the cake and add chopped Oreos, if using.
- Once cakes are cool, remove cake domes from top with a large serrated knife.
- Place first layer of cake on cake plate. Spread 1/2 of the icing with the chopped Oreos on top in an even layer.
- Add second layer of cake and add the rest of the of icing with chopped Oreos on top in an even layer.
- Add final layer of cake on top and frost the outside of the cake with remaining frosting. Feel free to use my tutorial for how to frost a smooth cake.
- To make the chocolate ganache, add the chocolate chips to a medium sized bowl (see my tips on making chocolate ganache).
- Heat the heavy whipping cream just until it begins to boil, then pour it over the chocolate chips. Allow it to sit for 2-3 minutes, then whisk until smooth.
- Drizzle the chocolate ganache around the edge of the cake, then pour the remainder of the ganache on top of the cake and spread evenly. I like to use a squeeze bottle for drizzling around the edges.
- Allow the ganache to firm up a bit, then pipe the remainder of the frosting around the top edge of the cake (see my tips on making a chocolate drip cake) and add an Oreo between each swirl. I used Ateco tip 844.
- Sprinkle a few Oreo crumbs onto to the cake, if desired, then serve. Cake is best when well covered for 3-4 days.
