Sweet potato cornbread in the making 🥰

1 cup fine yellow cornmeal

1 cup all-purpose flour

1/4 cup packed light or dark brown sugar

4 teaspoons baking powder

1 teaspoon baking soda

1 teaspoon kosher salt

1/2 teaspoon ground cinnamon

1/4 teaspoon ground nutmeg

2 large eggs

2 cups whole buttermilk

1 cup cooked and mashed sweet potato

6 tablespoons unsalted butter, melted