I was invited to a very dear 11 year old boy’s birthday party. I offered to bake the cake and his mum was delighted to let me do it. His favorite ingredient is chocolate and so I decided to bake a chocolate cake with Oreo’s in it. That was the biggest surprise when the cake was cut – ‘Oh goodness – does it have Oreo’s inside? ‘. I have made an Oreo cookie birthday cake before and used more of a chocolate cake batter but I wanted this one to be lighter. I looked up one of my favorite chef personalities Ina Garten and this is a take on her Double-Chocolate layer cake.
I do not always have buttermilk in the fridge so I keep powdered buttermilk on hand and make it as needed.
I will say it was a hit. The birthday boy loved it and had two pieces. Then when I was taking the cake plate with me. He asked his mum ‘Do I get to keep the cake?’ Cutest thing ever!. I got a huge compliment from my mum. She said ‘Its your best cake ever!’
I am sorry that I do not have the times that I did to make the cake and frostings – but overall prep time should not be more than 20 minutes for the cake and 15 for each of the icings.
Ingredients
For the cake
1 3/4 cups sifted all purpose flour
1 1/4 cup sugar
3/4 cup unsweetened cocoa powder
1 teaspoon baking powder
1 teaspoon sea salt
1 cup buttermilk
1/2 cup vegetable oil
2 large eggs (room temperature)
1 teaspoon vanilla extract
1 cup hot coffee (1 1/2 tablespoon of instant Nestle coffee)
1 package double stuffed Oreos
For the filling
Oreo cookies crushed
1/2 cup unsalted butter, room temperature
1 1/2 cups sifted confectioners’ sugar
2 tablespoons milk
2 teaspoons vanilla extract
For the frosting
1/2 cup unsalted butter + 2 tablespoons, room temperature
1/2 cup unsweetened cocoa powder
1 teaspoon vanilla extract
1 1/2 cup confectioners sugar
1/4 cup milk or heavy cream
1 cup milk chocolate chips or good quality milk chocolate
Oreo cookies to decorate
Method
For the cake
Preheat the oven to 350F. Butter two 8 inch by 2 inch round cake pans and line them with parchment paper. Butter the paper.
Whisk dry ingredients (flour, sugar, cocoa, baking powder, sea salt) in a stand mixer. Whisk the buttermilk, oil, eggs and vanilla (I use the electric whisk). Add this to the dry mixture and whisk until just incorporated.
With tongs dip 12 Oreo cookies in the hot coffee to soften just a bit and set aside. Add the hot coffee and whisk to incorporate. The batter will be very liquid. Pour the batter equally into the prepared pans. Distribute 6 Oreos per pan and make sure they are submerged.
Bake the cakes for 35 minutes, or until a toothpick inserted into the center of the pan comes out clean. Take the cakes out and let them cool on a wire rack for about 30 minutes. Run a knife around the edge, remove them from the pan and let them cool completely on a wire rack.
For the Filling
Reserve 8-9 Oreo cookies and set aside. Crush the remaining in a food processor or seal in a plastic bag and run a rolling pin over them till they are finely crushed.
Cream butter in a stand mixer using the paddle attachment. If your paddle attachment does not have a scraper, stop the mixer and scrape down the sides of the bowl at least twice. Add confectioners sugar a half cup at a time beating well between each addition. Add the crushed Oreo cookies, vanilla and milk and beat. The filling should be fairly thick but spreadable. If it is too firm add a teaspoon of milk to reach spreading consistency.
For the frosting
Microwave the chocolate with the 2 tablespoons of butter for 20 seconds. Then go for two to three 5 second bursts making sure the butter has melted. Stir the butter chocolate mixture making sure that all the chocolate has melted and let it cool. If the chocolate has not melted microwave again in short 5 second bursts stirring between each burst.
Cream the 1/2 cup of butter in a stand mixer using the paddle attachment until light and fluffy. Add the cocoa powder, vanilla extract, half the sugar and half the milk/cream and beat until incorporated. Add the remaining sugar and milk and beat again until incorporated. Add the cooled melted chocolate and beat until incorporated. Again if you feel the icing is not going to spread at this time add a little more milk/cream.
To assemble
Place one cooled cake flat side down on your cake plate. Place strips of parchment under the edges of the cake. This will help you have a clean cake stand at the end. Spread your filling on the top of the cake in an even layer.
Place the second cake – flat side (parchment side) up on top of the filling. Press down gently to get an even top. Using an offset spatula scrape off any filling that has squeezed out.
Pour your frosting over the top of the cake and using a clean offset spatula push it gently towards the edges and let it drip over. Then using your offset spatula turn your cake plate slowly and using your offset spatula make an even edge. Gently pull out the pieces of parchment paper and you have neat edges!.
Now split the remaining Oreo cookies and scrape off the filling. Use the Oreo halfs to decorate the cake.
Refrigerate the cake for about an hour. Take it out of the fridge for about 15 minutes before you serve it.