01 - Preheat the oven to 400°F and line a baking sheet with parchment paper.
02 - In a large bowl, whisk together the all-purpose flour, whole wheat flour, sugar, baking soda, baking powder, and salt until well blended.
03 - Stir in the raisins or currants and caraway seeds if using.
04 - In a separate bowl, whisk together the buttermilk, egg, and melted butter until combined.
05 - Pour the wet ingredients into the dry ingredients. Mix gently with a fork until just combined; do not overmix as this will result in tough scones.
06 - Turn the dough out onto a lightly floured surface and pat into a circle about 1 inch thick.
07 - Cut the circle into 8 equal wedges and transfer to the prepared baking sheet, spacing them at least 2 inches apart.
08 - Brush the tops with buttermilk and sprinkle with coarse sugar if desired.
09 - Bake for 16 to 18 minutes, or until golden brown and a toothpick inserted into the center comes out clean.
10 - Cool on a wire rack for at least 5 minutes. Serve warm or at room temperature with Irish butter and jam.