Lawson was next signed to BBC Two to host a three-part cookery show entitled "Nigella's Christmas Kitchen", which began on 6 December 2006 and aired weekly. The first two episodes secured the second highest ratings of the week for BBC Two, with the first episode debuting with a strong 3.5 million. The final episode went on to become the top show on BBC Two the week that it was aired. "Nigella's Christmas Kitchen" won Lawson a second World Food Media Award in 2007. Her influence as a food commentator was also demonstrated in late 2006, when after she had lauded goose fat as being an essential ingredient for Christmas, sales of the product increased significantly in the UK. Waitrose and Tesco both stated that goose fat sales had more than doubled, as well as Asda's increasing by 65% from the previous week. Similarly, after she advised using prunes in a recipe on "Nigella's Christmas Kitchen", Waitrose had increased sales of 30% year on year.