Appears in Cook's Illustrated November/December 2015, America's Test Kitchen TV
The secrets to creamy sweet potato soup with deep, earthy-sweet flavor? Use those peels, and turn off the heat.
Most sweet potato soup recipes call for so many other ingredients that the sweet potato flavor is muted. By cutting back to just shallot, thyme, and butter and using water instead of broth, we put the focus back on the main ingredient. We a...