Preheat the oven to 400°F. Grease a 9x9-inch baking pan or line it with parchment paper.
In a large mixing bowl, combine the cornmeal, flour, baking powder, salt, cinnamon, and nutmeg. Whisk until well blended.
In another bowl, mix the mashed sweet potatoes, honey, melted butter, eggs, and milk until smooth.
Pour the wet ingredients into the dry ingredients and stir until just combined. Do not overmix; a few lumps are okay.
Pour the batter into the prepared baking pan and spread it evenly.
Bake for 25-30 minutes, or until a toothpick inserted into the center comes out clean.
Let the cornbread cool in the pan for about 10 minutes before slicing and serving.