Easy Creamy Pumpkin Soup

Name: Easy Creamy Pumpkin Soup
Prep time: 10 min
Cook time: 25 min
Total time: 35 min
Cuisine: American
Ingredients: 1/4 cup butter or 1/4 cup margarine; 1 small onion, chopped; 1 garlic clove, finely chopped; 2 teaspoons packed brown sugar; 1 (14 1/2 fluid ounce) can chicken broth; 1/2 cup water; 1/2 teaspoon salt (optional); 1/4 teaspoon ground black pepper; 1 (15 ounce) can pumpkin puree; 1 (12 fluid ounce) can evaporated milk; 1/8 teaspoon ground cinnamon