Sweet Potato Biscuits

Bahan-bahan (12 porsi)

• 2 small sweet potatoes
• 2 1/4 cups all purpose flour
• 1 tablespoon baking powder
• 1 teaspoon fine sea salt
• 1/2 teaspoon baking soda
• 1/4 teaspoon ground cinnamon
• 1/4 teaspoon grated nutmeg
• 6 tablespoons cold unsalted butter, (cut into tablespoons)
• 1/2 cup buttermilk (cold)
• 2 tablespoons maple syrup
• 1 tablespoon melted butter, (for brushing tops)