01 - Preheat your oven to 400°F. Line a baking sheet with parchment paper or lightly grease it.
02 - In a large mixing bowl, whisk together the whole wheat flour, all-purpose flour, baking soda, salt, and brown sugar until well combined.
03 - Stir in the dried currants to evenly distribute throughout the flour mixture.
04 - Make a well in the center of the dry ingredients, then pour in the buttermilk and melted butter. Mix gently with a wooden spoon or your hands until a shaggy dough forms. Do not overmix.
05 - Turn the dough out onto a lightly floured surface and knead just enough to bring it together, about 30 seconds.
06 - Shape the dough into a round loaf, about 7 inches in diameter. Place it on the prepared baking sheet.
07 - With a sharp knife, cut a deep X across the top of the loaf to allow for expansion during baking.
08 - Bake for 35-40 minutes, or until the bread is golden brown and sounds hollow when tapped on the bottom.
09 - Transfer to a wire rack to cool for at least 20 minutes before slicing to ensure proper texture.