Slow-Cooker Creamy Tomato Soup | America's Test Kitchen

Ingredients

• 1 onion, chopped fine
• 2 tablespoons unsalted butter
• 2 tablespoons all-purpose flour
• 1 tablespoon packed brown sugar
• 1 tablespoon tomato paste
• Salt and pepper
• Pinch cayenne pepper
• 3 (14.5-ounce) can diced tomatoes
• 3 cups chicken or vegetable broth, plus extra as needed
• 2 bay leaves
• 1/2 cup heavy cream
• 2 teaspoons dry sherry