Melt butter in saucepan and add condensed milk and golden syrup and stir continuously on low heat until it is thick (usually around 10 minutes). Make sure you scape the bottom regularly so nothing burns.For the Thermomix add all the ingredients in and cook for 10 minutes on 100, stirring on speed 3, with the MC off. Remove the lid carefully, wipe the moisture off the top of the lid without dripping it, then replace without the MC and cook for 2 minutes/Veroma/Speed 3.