To the dry ingredients, add in the eggs, butter (1/4 cup), buttermilk, and pureed pumpkin. Stir just until combined.
Pour 1/4 cup of the melted butter throughout the cast iron skillet pan.
Pour the mixture into the cast iron skillet, reserving about an inch from the top. If using a 10.25 inch cast iron, the batter will fit.
Bake for 20-25 minutes or until a toothpick can be inserted and return clean.