01 - Preheat oven to 375°F. Grease a 24-cup mini muffin pan or line with paper liners.
02 - In a large bowl, whisk together all-purpose flour, whole wheat flour, sugar, baking soda, baking powder, and salt until evenly blended.
03 - Stir in currants or raisins and caraway seeds if using, tossing to coat evenly with flour mixture.
04 - In a separate bowl, whisk together melted butter, buttermilk, and egg until fully combined and smooth.
05 - Pour wet ingredients into dry ingredients. Fold gently with a spatula until just combined—batter should remain slightly lumpy. Avoid overmixing.
06 - Divide batter evenly among mini muffin cups, filling each about 3/4 full.
07 - Bake for 16 to 18 minutes until tops are golden brown and a toothpick inserted into the center comes out clean.
08 - Let muffins cool in pan for 5 minutes, then transfer to wire rack to cool completely. Serve warm or at room temperature.