I’m a fan of thick, hearty soups. Although I make miso or hot and sour soup when I’m down with a bug, I gravitate toward soups that you know are filling just by looking in the pot.
Last week, I mentioned a range of thickeners that can be added to the pot. My favorites are flour-and-butter roux, as in 30-Minute Cherry Tomato Soup. and potatoes. Potatoes have the advantage of acting as both main ingredient and thickener and can be the prominent—or even the primary—ingredient; they can be added to the pot precooked or raw. Like tomatoes, potatoes are mostly water, but the portion that is solid is almost entirely starch. As you heat potatoes, the starch softens, expands, and gels, making the soup more viscous. Keep this in mind when you’re preparing a potato-thickened soup: Potato starch gels at a lower temperature than flour. The result is a far thicker soup. Learn to make Hearty Corn Chowder and Boozy Potato Chowder