Sweet Potato Casserole

Ingredients

• 4 tablespoons dark brown sugar or light
• 1 teaspoon orange zest freshly grated, plus 2 tablespoons orange juice, from 1 orange
• 3 pounds sweet potatoes peeled and cut into 1 1/2-inch pieces
• 4 tablespoons butter cubed
• 1/4 cup heavy cream
• 1 teaspoon salt
• 1/2 teaspoon ground cinnamon
• 1/4 teaspoon black pepper
• 1/8 teaspoon cayenne pepper