This delicious iced pudding is intended to look like the traditional helmet of a Tuscan mercenary going into battle, which in turn was named after a small, rounded pumpkin. It’s not difficult to make; the most fiddly part is the stencilling at the end. If you prefer, just dust the whole thing with icing sugar, then lightly dust with cocoa powder. This is a great dessert to keep as a standby in the freezer. Divide the mixture in half and make two smaller bowls if you wish.