Peel and coarsely chop onions to get a packed 4 cups. Coarsely chop apple to get a heaping 1 cup. Melt butter in a large pot over medium heat. Add the chopped onions and garlic. Season with salt and pepper. Cook for 10–12 minutes, stirring occasionally, until soft.
Stir in cinnamon, nutmeg, cloves, apple, and pumpkin. Stir, then pour in chicken stock, thyme, and maple syrup. Stir again. Bring to a boil, then reduce heat and simmer uncovered for 20 minutes.
Puree the soup in a blender until smooth (work in batches if needed). Return soup to the pot and stir in the cream. Taste and adjust the seasoning, adding more maple syrup or salt if needed.
Ladle the soup into bowls. Garnish with a swirl of cream (see note 3) and pepitas. Serve with crusty buttered bread.
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Notes
Note 1: Use canned pumpkin like Libby’s, or substitute with 1.2 pounds of fresh sugar pumpkin. Peel, remove seeds, and cut into 1.5-inch chunks. Add to the recipe with the apple and simmer until tender.Note 2: Use a flavorful stock like Swanson’s. For a vegetarian option, use vegetable stock.Note 3: Pour 1 tablespoon heavy cream into a small bowl. Briskly whisk with a small whisk for about a minute to thicken. Then drizzle over the soup. Storage: Freeze in bags or store in the fridge for 3-5 days. Reheat slowly on the stovetop.