Preheat oven to 375 degrees F. Add butter to 8-inch cast iron skillet and place inside of oven to preheat.
In a medium bowl, add sweet baking mix, cornmeal, baking soda and salt. Blend well with whisk. Add eggs, buttermilk and melted butter from cast iron skillet (once oven is preheated). Stir well and taste for sweetness, adjust if needed.
Pour batter into hot cast iron skillet and bake for 16-20 minutes or until corn bread begins to brown.
Recipe by Satisfying Eats at https://satisfyingeats.com/sweetbakingmixrecipes-2/