Step 1

Add the butter to a large soup pot over medium-high heat. Once the butter melts and becomes foamy, add the garlic, onions and ginger and saute until tender and fragrant, 3 to 4 minutes. Season with salt and pepper. Add the chipotle pepper and saute for 1 minute longer while breaking it up with a wooden spoon. Add the chicken broth, apple cider and sweet potatoes. Bring to a simmer and cook until the sweet potatoes are tender, about 20 minutes.

Step 2

Puree the soup using an immersion blender until smooth and velvety. Finish by stirring in the heavy cream. Top each bowl with sour cream if using.