[header] How to make marbled chocolate caramel slice [title] Preheat the oven to 350ºf/180ºc. [title] Combine the butter, flour, and superfine sugar in a bowl with your hands. [step] Mix thoroughly until the mixture resembles as fine breadcrumbs and a crumbly " dough ". [title] Press the dough in a pre-greased or non-stick 13 " x9 " (23x33 cm) pan. 
[step] Use the back of a spoon to smooth it evenly into the tin. Use fork prongs to prick all over and bake for 20 minutes.