01 - Preheat oven to 375°F. Line 12-cup muffin tin with paper liners or grease thoroughly.
02 - In large bowl, whisk together all-purpose flour, whole wheat flour, sugar, baking soda, baking powder, and salt until uniform.
03 - In separate bowl, whisk buttermilk, egg, and melted butter until fully incorporated.
04 - Pour wet ingredients into dry ingredients. Fold gently with spatula just until combined; avoid overmixing to prevent tough texture.
05 - Fold in dried currants and caraway seeds if using until evenly distributed throughout batter.
06 - Divide batter evenly among prepared muffin cups, filling each approximately 3/4 full.
07 - Bake 16-18 minutes until golden brown and toothpick inserted into center comes out clean.
08 - Let muffins rest in tin 5 minutes, then transfer to wire rack to cool completely before serving.