Grease and line a 20cm square cake pan with baking paper.
Place 2 of the Snickers bars, butter and golden syrup into the Thermomix bowl. Melt on 80 degrees, Speed 2 for 3 minutes.
Add the rice bubbles, the remaining chopped Snickers bar, the chopped peanuts and caramel sauce. Mix on Reverse Speed 2 for 15 seconds or until completely combined.
Press the mixture into the prepared tin.
Place the chocolate melts and coconut oil into a clean Thermomix bowl.Melt on 50 degrees, Speed 3 for 2-3 minutes (scraping down the sides of the bowl occasionally).
Spread over slice and refrigerate until firm (approximately 4 hours).
Remove the slice from the refrigerator 20 minutes before cutting into squares with a warm knife.