Preheat your oven to 350°F and line a muffin tin with paper liners (or grease it if you’re feeling adventurous).
In a large bowl, whisk together the flour, baking powder, baking soda, cinnamon, and allspice. This is the moment when your kitchen starts smelling amazing.
In a separate bowl, mix together the grated carrots, walnuts, raisins, brown sugar, vegetable oil, eggs, and vanilla extract. The batter will look a little lumpy, but trust the process.
Pour the wet mixture into the dry ingredients and stir until just combined. Don’t overmix! Overmixing leads to dense muffins, and we’re aiming for fluffy perfection.
Divide the batter evenly among muffin cups, filling each about ¾ full. Bake for 18-20 minutes, or until a toothpick inserted in the center comes out clean.
Let the muffins cool in the tin for about 5 minutes before transferring them to a wire rack. If you’re feeling fancy, sprinkle some extra chopped walnuts on top or drizzle with a bit of maple syrup for an extra touch of sweetness.