Preheat oven to 400 degrees. Grease and flour a 9-inch baking pan.
In a large bowl, whisk together buttermilk, sour cream, cornmeal, baking soda, salt, and sugar.
Add eggs and melted butter to the mixture and stir until well combined.
After mixing the batter, pour it into the pan that has been prepared. Bake for 25 to 30 minutes, or until a toothpick inserted in the center comes out clean.
Allow the cornbread to cool slightly before serving. Enjoy!