Preheat your oven to 180 degrees celsius (fan-forced)and line two trays with baking paper.
Place 125g of softened butter the brown sugar into your Thermomix bowl (with the butterfly attached) and mix for 30 seconds on speed 3 to combine. Scrape down the sides and mix for a further 20 seconds on speed 3 or until pale and creamy.
Add 1 teaspoon of vanilla extract and the egg to your Thermomix bowl and mix for 10 seconds on speed 3.
REMOVE THE BUTTERFLY ATTACHMENT and add the self raising flour, flour and desiccated coconut to your Thermomix bowl and mix for 30 seconds using the ‘kneading’ function.
Use a tablespoon to scoop up the mixture and gently roll into little balls before placing on the baking trays. Repeat until you have used all of the mixture.
Gently press down on the top of the balls with the back of a fork to flatten, before placing the baking trays into the oven to bake for 10 – 12 minutes.
Let the Monte Carlo Biscuits cool on the baking trays for 10 minutes before carefully transferring to a wire rack to cool completely.
To make the buttercream filling, place 60g of softened butter, ½ teaspoon of vanilla extract and the icing sugar mixture into a clean Thermomix bowl with the butterfly attached and mix for 30 seconds on speed 3.
Scrape down the sides and mix for a further 10 seconds speed 3 or until the buttercream is pale and creamy.
Smear a teaspoon of the buttercream onto the back of one biscuit and a teaspoon of raspberry jam onto the back of another biscuit and sandwich together. Repeat until you have used all of the biscuits