Some easy sweet potato soup recipes include the sweet potato soup recipe on FoodNetwork.com and the sweet potato and sausage soup recipe on Epicurious.com. The Food Network recipe yields a smooth soup, while the Epicurious recipe produces a chunky soup.
To make the Food network's sweet potato soup, combine 1 tablespoon of flour with 1 tablespoon of butter in a pot over medium-low heat to form a pale golden brown sauce. Pour in 1 1/2 cups of broth, and add 1 tablespoon of light brown sugar. Boil the mixture briefly, and then reduce the heat.
Incorporate 1 1/2 cups of cooked sweet potatoes, 1/4 teaspoon of ground ginger, and 1/8 teaspoon each of ground cinnamon and nutmeg. Simmer the mixture for five minutes before blending the soup. Reheat the pureed soup in the pot with the addition of 1 cup of milk. Add salt and pepper to taste.
To make sweet potato and sausage soup, brown 10 ounces of sliced chorizo sausage with 2 tablespoons of olive oil in a pot. Set the sausage aside. Sauté 2 chopped onions, 2 minced garlic cloves, 2 pounds of chopped sweet potatoes and 1 pound of chopped potatoes. Pour in 6 cups of chicken broth, and then cover and simmer the mixture for about 20 minutes.
Use a potato masher to smash up some of the potatoes before adding the reserved sausage. Cook 9 ounces of fresh spinach in the soup before mixing in another tablespoon of olive oil and adding salt and pepper to taste.