Preheat your oven to 375˚F.
Add the wet ingredients to a medium bowl and mix.
Add the dry ingredients and fold in until combined but still a bit shaggy.
Form the dough into a round loaf. If it is too wet, used floured hands.
Place the dough ball into a 9" cast iron skillet or onto a baking tray lined with parchment paper.
With a sharp knife cut an X into the loaf.
Brush the top of the loaf with melted butter.
Bake for 45-55 mins or until a toothpick comes out clean.
Gently remove the soda bread from the cast iron skillet and let cool down on a wire rack.