01 - Preheat the oven to 400°F. Line a 12-cup muffin tin with paper liners or lightly grease with butter.
02 - In a large bowl, whisk together the flours, sugar, baking soda, baking powder, salt, raisins or currants, and caraway seeds if using.
03 - In a separate bowl, whisk the buttermilk, melted butter, and egg until well combined.
04 - Pour the wet ingredients into the dry ingredients. Stir gently with a spatula until just combined—do not overmix.
05 - Divide the batter evenly among the prepared muffin cups, filling each about 3/4 full.
06 - Bake for 18–22 minutes, or until the tops are golden brown and a toothpick inserted into the center comes out clean.
07 - Let the muffins cool in the pan for 5 minutes, then transfer to a wire rack to cool completely. Serve warm or at room temperature.