Preheat oven to 375 degrees, line a baking sheet with parchment paper and spray lightly with cooking spray. In a large bowl, sift together flour, sugar, baking soda, baking powder and salt.
In a separate smaller bowl, combine buttermilk with beaten egg. Make a well in the center of dry ingredients and pour buttermilk and egg mixture along with the melted butter into the well and stir just until a ball of dough forms.
Form dough into a cohesive ball and place on prepared baking sheet. Pat dough into about an 8"–9" round loaf (the loaf will be 3"–4" thick in the center). Use a sharp knife to cut an X into the top of the dough.
Combine 2 Tbsp melted butter with 2 Tbsp buttermilk and brush entire amount onto the dough, covering the entire loaf. Bake 40–50 minutes or until a toothpick comes out clean. Remove from oven and cool until warm or room temperature, slice and serve.
One Last Thing
No yeast means no long wait times—just stir together the ingredients, bake and enjoy!