Preheat oven to 425°F (220°C).
Pierce sweet potatoes with a fork and microwave for 8-10 minutes until tender. Peel and mash until smooth.
In a large bowl, whisk together cornmeal, flour, baking powder, baking soda, and salt.
In another bowl, beat eggs, buttermilk, maple syrup, melted butter, and vanilla.
Fold mashed sweet potatoes into wet ingredients.
Combine wet and dry ingredients until just mixed.
Pour into preheated, greased cast iron skillet.
Bake for 30-35 minutes until golden brown.
Brush with honey while hot.