CAKE
Preheat your oven 180C / 160C (fan) / 350F / Gas4
Grease and line your 8 x 12 inches / 32cm x 22cm tin. Please place your balking parchment over the edges. This will help after baking to lift cake out tin
In a large bowl add your dry ingredients, self-raising flour, cocoa powder, baking powder & golden caster sugar and mix well
Add your vegetable oil, 3 eggs, milk and vanilla extract. Using a large whisk and beat until smooth, no lumps. It will be a pouring consistency
Bake in the centre of the preheated oven for 40-45 minutes, until firm to the touch. Please remember all ovens vary
Once baked remove from the oven and leave to cool in the tin for 15 minutes
After 15 minute pop a cooling rack on top of the tin and invert, removing our baking paper. Leave to completely cool
Buttercream
Cream your butter, icing sugar and cocoa powder until smooth, adding your milk one tablespoon at a time. Should be a lovely chocolaty flavour and super smooth
Decorate
Pop your edible eyes on your Oreos - using a tiny bit of butter cream and place on one side
Add your buttercream top the top of your sponge, using a knife to spread to the sides
Then pop your Oreos, 3 in a row, for 4 rows on top of your buttercream. Go mad with your sprinkles :-)
Slice and enjoy!