Gluten Free Sweet Potato Casserole

Ingredients (15)

• 4 lbs. sweet potatoes
• 1 stick (8 Tablespoons) unsalted butter, cut into four chunks
• 2/3 cup brown sugar
• 1/4 cup maple syrup
• 1/2 cup half and half
• 1 teaspoon vanilla extract
• Salt, to taste (I like about 1 teaspoon of Kosher salt)
• 1 teaspoon cinnamon
• 1/2 teaspoon cardamom
• 6 cups cornflakes, crushed (Makes about 2 1/2 cups)
• 2/3 cup chopped pecans
• 1/3 cup packed brown sugar
• 1/2 teaspoon cinnamon
• 3 Tablespoons butter, melted
• 3 cups mini marshmallows