Add 2 tablespoons of vegetable oil to your cast iron skillet and place it in the oven while it preheats to 425 degrees F.
In a large mixing bowl combine all the dry ingredients, then add in all the wet ingredients. Gently fold them in until they are just combined, do not over mix. The batter will be smooth, but thick.
Pour your batter into your cast iron skillet. Bake for 22-24 minutes. The top should be golden and puffy with visible cracks on the edge of the surface. Use a toothpick to test, if it comes out clean it is ready.
While the sweet potato cornbread is baking, start the Peach Bourbon Glaze. Pour the bourbon into a small saucepan and bring to a light boil. Allow it to cook until it reduces until it is thick enough to slightly stick to a spoon, about 15 minutes.
Remove from heat, add a stick of salted butter, and stir until melted.
Once your sweet potato cornbread comes out of the oven, pour the glaze on top. Let cool for 5 minutes, then enjoy!