While making soup, Ramsay plops butter into the recipe in a move he dubs a "naughty chef's trick." This nearly last step in the soup-making process is a move that helps make the soup extra smooth and delicious. In the video posted to Facebook, Ramsay shows that pumpkin that has been roasted with rosemary and garlic and is blended with butter is the kind of foundation that sets the stage for a tasty meal.