In a large mixing bowl combine 4 cups all-purpose flour, 1/2 cup melted unsalted butter, 4 tbsp granulated sugar, 1 tsp baking soda, 1 tbsp baking powder, 1 tsp fine sea salt, 1 3/4 cup buttermilk and 1 egg. Mix until a shaggy dough forms.
Roll the dough into a ball and place on a sheet of parchment paper.
Pick up the dough by the parchment paper and place in a Dutch oven or cast iron pot. Place the lid on top.
Place in the preheated oven and bake for 45 minutes. After 45 minutes, stick a thermometer in the center; it should read 200 degrees. If not, bake for an additional 10 minutes.
Remove when the bread is finished and allow it to cool for 15-30 minutes before slicing.