Preheat your oven to 375°F (190°C) to ensure even baking and beautiful rise.
Line a muffin tin with parchment paper or muffin liners for easy removal after baking.
In a large mixing bowl, whisk together all-purpose flour, whole wheat flour, yellow cornmeal, old-fashioned oats, granulated sugar, baking powder, and baking soda until well combined.
In another bowl, whisk together low-fat buttermilk, pure maple syrup, eggs, and melted butter until smooth and homogenous.
Pour the wet ingredients into the dry ingredients bowl and gently fold together with a spatula until just combined; some lumps are okay.
Fold in the chopped dried fruit evenly throughout the batter.
Spoon the batter into the prepared muffin tin, filling each cup about two-thirds full to allow room for rising.
Bake in the preheated oven for 18-20 minutes, or until a toothpick inserted in the center comes out clean.
Remove from oven and let muffins cool in the tin for 5 minutes, then transfer to a cooling rack to cool completely.