Preheat your oven to 375°F.
Grease or line muffin tins with paper liners.
In a large bowl, whisk together flour, baking powder, cinnamon, and salt.
In a separate bowl, whisk together sugar, vegetable oil, and eggs.
Stir the wet mixture into the dry ingredients just until combined.
Gently fold in shredded carrots, shredded apple, and raisins.
Divide the muffin mixture evenly into prepared muffin tins, filling each cup about two-thirds full.
Bake for 25-29 minutes, or until tops are golden brown and a toothpick comes out clean.
Allow muffins to cool before transferring to a zippered bag or airtight container.