01 - Preheat oven to 400°F. Line a 12-cup muffin tin with paper liners or grease lightly with butter.
02 - In a large bowl, whisk together both flours, sugar, baking soda, baking powder, salt, raisins or currants, and caraway seeds until evenly distributed.
03 - In a separate bowl, whisk the buttermilk, melted butter, and egg until fully incorporated and smooth.
04 - Pour the wet ingredients into the dry ingredients. Fold gently with a spatula just until combined—do not overmix or the muffins will become tough.
05 - Divide batter evenly among prepared muffin cups, filling each about three-quarters full.
06 - Bake for 18 to 22 minutes until tops are golden brown and a toothpick inserted into the center comes out clean.
07 - Let muffins cool in the pan for 5 minutes, then transfer to a wire rack to cool completely. Serve warm or at room temperature.