Matt Lucas: "Paul and Prue are hoping for a classic treacle tart made with short crust pastry and finished off with SU2C themed pastry decorations."

Paul Hollywood: "Our sample treacle tart has been decorated with the stand up to cancer (SU2C) logo, which I think is beautiful. Anyway, I think the treacle tart is a nice challenge for our celebrity bakers. They're just making a shortcrust pastry and then the filling is pretty straightforward. It's a case of just putting it all together and giving it a good stir to incorporate all the ingredients. And the whole point of a short crust pastry is, in its name, a short crust, because you should be able to break it fairly easily, should be almost crumbly. "