Preheat the over to 160°C Fan or 180°C Conventional.Line a muffin tin with muffin cases and place 1 Oreo in each.
In a jug whisk together 175ml of Boiling Water with the Cocoa Powder and set aside to cool to room temperature.(To speed this up I put it in a sink of cold water so the water comes up the sides to just above the cocoa line and whisk gently to cool quickly)
In a bowl combine the Plain Flour, Bicarbonate of Soda, Salt and Caster Sugar.(I sieve the Flour, Bicarb & Salt and then using a whisk mix the sugar in to have an even crumb)
Once the Cocoa and Water mixture is at room temperature add the Vanilla Extract and both Eggs, Whisk until smooth.
Add the Butter (or Margarine) to the Flour, Sugar etc and pour in 1 third of the Cocoa mixture. Stir together until smooth.
Add another third of the Cocoa and beat it in.Repeat with the final third.
Pour into cases engulfing the Oreo at the bottom. you want to fill the cases to 2 thirds full.Bake in the oven for 20 – 22 minutes.Once the cakes are springy and remove and let them cool in the pan.
To Make the Buttercream
Scrape out the white filling of each of the 5 Oreos and set aside.Place the Black discs of the Oreos into a chopper and blitz to a very fine crumb.(You could put these in a bag and bash if you wish)
In a bowl beat the Butter and the white filling from the Oreos until smooth and creamy.Sieve in 150g the Icing sugar and beat until combined.Add 1 tbsp Almond Milk.Repeat with 150g Icing Sugar and 1 tbsp Almond Milk.
Add the Final 100g Icing Sugar, the final 1 tbsp Almond Milk and the 4 tbsp Oreo crumbs.Mix until thoroughly combined and pipe-able, or spreadable if you prefer.Adorn the top of each cooled cupcake with the Oreo buttercream and if you have crumbs left over scatter them over the top also.
Notes
LEFTOVERS TIP
Left over cupcakes, who would have such a problem? If you find yourself in this situation the first thought is cake pops. Crumble the cakes add a little more frosting and mix until the are mouldable then cover in melted chocolate.Another idea would be to scrape off the buttercream and mix a custard and create a cupcake bread pudding delicious with cream.