I really want to do these from the full steam ahead cookbook for Xmas. I have 12 people for Xmas lunch. Can anyone suggest a steaming time for 12 puddings. I want to use the silicone cupcake molds you can buy from homeware stores. The recipe on the book is for 4 portions and it suggests adding 5 min to the cooking time if you double the recipe. What should I do for 12 ? I have done the recipe for the standard 4 people and it works really well. It is such a festive recipe especially with the marzipan!!