150 grams buttermilk (To make add 1 tsp of white vinegar to 150g milk. Let for 5 minutes. Stir before using.
4 eggs - room temp
Method
Preheat oven to 150c (fan forced). Grease and line small baking dish.
Add dry ingredients to Thermomix bowl and sift on Turbo 0.5 x 3.
Set aside.
Place sugar into Thermomix bowl and mill 4 sec/sp 9.
Add chocolate and Mars Bars, butter, coffee and water into Thermomix bowl and cook 6 minutes/60/speed 1, increasing to speed 3 as it all begins to melt. Then melt a further 3 min/60/sp 2.5.
Do a final mix to incorporate all the ingredients 10 sec/sp 4.
Add reserved dry ingredients and buttermilk to bowl and mix for 45 sec/sp 1.
Set machine to 1 minute/sp 4 add the eggs one at a time through the lid. Scrape down and mix again 30 sec/sp 4.
Pour mixture into prepared pan.
Bake for around 1¼ hours or so, depending on your oven.
Leave in tin to cool fro 10 to 15 minutes, then turn on to a wire rack.
Notes
Ice with ganache or split in half and place jam in the middle and whipped cream on top. Can also be served warm as a dessert. Pour over warmed ganache, raspberry coulis and serve with whipped cream or ice cream.
Recipe by ThermoGourmand at https://thermogourmand.com.au/index.php/2015/02/11/mars-bar-chocolate-cake/