Giant Oreo Birthday Cake

August 12, 2013
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For my roomie Ruths birthday the other week, we had a big house party in our new Coogee house so I wanted to try making a new cake for it.
We are all chocolate lovers in the house so it had to be chocolate and also pretty big so everyone had a slice!!

Giant Oreo Cake
Serves 8
  1. 90g cocoa powder, plus more for dusting
  2. 90g Milk Hot Chocloate Powder
  3. 1 1/2 teaspoons salt
  4. 375g flour
  5. 1 tbsp baking soda
  6. 1/2 cup olive oil
  7. 360ml cups buttermilk
  8. 600g sugar
  9. 1/2 teaspoon vanilla extract
  10. 1 1/2 teaspoons baking powder
  11. 3 large eggs, lightly beaten
  12. 1 1/2 cups hot water
Oreo Icing
  1. 200g Butter, softened
  2. 400g icing sugar
  3. 3 tbsp milk
  4. 1 lemon
  5. 2 packets of oreos
Chocloate Icing
  1. 125g icing sugar
  2. 20g cocoa powder
  3. 20g hot chocolate powder
  4. 120g butter, softened
  5. 2 tbsp milk
  6. 1/2 tsp vanilla extract
  7. pinch of salt
  1. To make the cake, preheat the oven to 180 degrees celsius and butter 2 cake tins.
  2. Line the tins with baking paper and then sprinkle the paper with some cocoa powder.
  3. Swirl the cocoa powder around until the paper is coated and shake off the excess into the sink/bin.
  4. Sift cocoa, flour, baking soda, baking powder, salt and sugar into a bowl.
  5. Beat in oil, buttermilk, vanilla, eggs, and hot water one at a time, using a mixer set at low.
  6. Beat until smooth, about 2 minutes.
  7. Pour the batter into the pans and bake for 30-45 mins or until you can stick a sharp knife in the centre and it is clean when it comes out.
  8. While the cake is baking, start your oreo icing by putting all the oreos minus 5 into a plastic bag and hitting a counter with the bag to break them all up. The remaining 5 oreos will be used to decorate the cake.
  9. Make the Icing by mixing the soft butter & icing sugar until smooth, then add the broken up oreos and lemon juice (lemon juice cuts through the sweetness of the icing).
  10. Now make your chocolate Icing by mixing butter in a bowl until smooth. Mix all your dry ingredients together and sift these into the butter a little at a time and keep mixing.
  11. Next add the milk and vanilla.
  12. When the cake is cooked, wait until it is fully cooled to start icing (the icing will melt and run off if its even slightly warm).
  13. Put all of your oreo icing on the top of one cake, then place the other cake on top.
  14. Ice the top and sides of the cake with the chocolate frosting
  15. Break your leftover oreos in half and stick them onto the top of the cake! Yum!
  1. Dont worry if your cake batter seems very runny before cooking, it's meant to be like that!

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