Preheat oven to 350°. Line a rimmed baking sheet with parchment paper.
In a medium bowl, whisk together flour, sugar, baking powder, lemon zest, baking soda, and salt. Using a pastry blender or 2 forks, cut butter into flour mixture until it resembles coarse crumbs. Stir in currants, cranberries, and caraway seeds. Add ½ cup plus 3 tablespoons buttermilk, stirring until mixture is evenly moist. (If mixture seems dry and won’t come together, add more buttermilk, 1 tablespoon at a time.) Working gently, bring mixture together with hands until a dough forms.
Turn out dough onto a lightly floured surface, and knead gently until smooth by patting dough and folding it in half 4 to 5 times. Using a rolling pin, roll out dough to a ¾-inch thickness. Using a floured 2¼-inch round cutter dipped in flour, cut 10 scones from dough, rerolling scraps as needed. Place scones, evenly spaced, on prepared baking sheet.
Brush tops of scones with remaining 1 tablespoon buttermilk.
Bake until bottoms of scones are golden brown and a wooden pick inserted in centers comes out clean, approximately 15 minutes. Serve warm.
Notes
*We used Kerrygold.
Recipe by TeaTime Magazine at https://teatimemagazine.com/currant-cranberry-carraway-scones-recipe/