Preheat your oven to 350°F (175°C) and line a muffin tin with paper liners.

In a large bowl, whisk together the all-purpose flour, whole wheat flour, baking powder, baking soda, cinnamon, and salt.

In another bowl, mix the brown sugar, granulated sugar, eggs, vegetable oil, and vanilla extract until well combined.

Gradually add the wet ingredients to the dry ingredients, mixing until just combined.

Fold in the grated carrots, chopped apples, raisins, and nuts until evenly distributed.

Divide the batter among the muffin cups, filling each about 2/3 full.

Bake in the preheated oven for 20-25 minutes, or until a toothpick inserted in the center comes out clean.

Remove from the oven and let the muffins cool in the tin for 5 minutes.

Transfer the muffins to a wire rack to cool completely.

Enjoy warm or store for later!