Preheat oven to 160 degrees celsius (fan-forced). Grease the base and sides of a loose-bottomed 23cm tart tin and place onto a flat baking tray. Set aside.
Crush the biscuits in a food processor until fine crumbs remain. Thoroughly mix through the melted butter and then press firmly into the base and sides of the prepared tin. Note: Use a spoon or a round cup to press the mixture firmly into the tart tin. If using a Thermomix: Place the butter (chopped) into the Thermomix bowl and melt for 3 minutes, 80 degrees, Speed 2. Add the biscuits and crush for 10 seconds on Speed 8. Press well into base and sides of prepared tart tin.
Place into the oven for 10 minutes before removing and setting aside to cool slightly.
To make the filling, place the golden syrup, condensed milk and butter into a small saucepan over low heat.If using a Thermomix: To make the filing, place the golden syrup, condensed milk and butter into a clean and dry Thermomix bowl. Mix for 8 minutes on 80 degrees, Speed 4.
Stir continuously for 10 minutes or until the caramel has thickened (make sure your heat is very low and you continue stirring until the sauce has obviously thickened).
Pour the caramel into the tart shell and bake for a further 15-20 minutes or until golden. Allow to cool.
To make the chocolate ganache, break the chocolate into chunks, add the cream and place both into a microwave-safe bowl. Microwave for 30 seconds. Stir and microwave for a further 30 seconds. If using a Thermomix: Break the chocolate into chunks and place it into a clean and dry Thermomix bowl. Add the cream and cook for 3 minutes on 60 degrees, Speed 2.
Allow the ganache to cool for 10 minutes or until slightly thickened (place into the fridge if needed).
Pour the chocolate ganache over the tart and place into the fridge to set.
Allow the tart to come to room temperature before serving.
Notes
RECIPE NOTES & TIPS
You can use any plain sweet cookies for this recipe. I used Arnott's Marie biscuits which are popular in Australia. Digestives would also be suitable.
Use full-fat sweetened condensed milk (not light).
Choose a full-fat (not light) thickened/heavy cream.
This recipe is best served at room temperature.
Store the tart in an airtight container at room temperature for up to 5 days, or freeze for up to 1 month.