Sweet Potato Casserole with Homemade Marshmallow Meringue - FineMark Bank & Trust, a division of Com

Ingredients

• 4 tbsp. 1/2 stick unsalted butter, melted, plus more for baking dish
• 4 lb. sweet potatoes
• 1/4 c. dark brown sugar
• 1/2 tsp. Ground mace
• 1/2 tsp. Cinnamon
• 1/8 tsp. cayenne pepper
• 3 large eggs plus 4 large egg whites
• 1 1/2 tsp. pure vanilla bean paste (divided)
• Kosher salt and freshly ground black pepper
• 2/3 c. granulated sugar
• 1/2 tsp. cream of tartar