This is a test of commonsense. Complete the next sentence:

How to make marbled chocolate caramel slice
Preheat the oven to 350f/180c.
Combine the butter, flour, and superfine sugar in a bowl with your hands.
Mix thoroughly until the mixture resembles as fine breadcrumbs and a crumbly " dough ".
Press the dough in a pre-greased or non-stick 13 " x9 " (23x33 cm) pan.
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.