Spiced Butternut Pear Soup

Ingredients

• 1 tablespoon butter, or more to taste
• 1 tablespoon olive oil
• 1 butternut squash, peeled and cubed
• 2 potatoes, peeled and cubed
• 1 onion, diced
• 1 carrot, peeled and chopped
• 1 stalk celery, chopped
• 1 clove garlic, minced
• 1 quart chicken broth, or more as needed
• 1 pear - peeled, cored, and sliced
• ¼ teaspoon ground ginger
• ⅛ teaspoon cayenne pepper
• ⅛ teaspoon ground allspice
• ⅛ teaspoon ground nutmeg
• salt and ground black pepper to taste
• ¼ cup heavy cream