Preheat oven to 425° F. Line a 12 - cup muffin pan with liners.
In a large bowl, whisk together flour, brown sugar, baking soda, cinnamon, and salt.
1 ¾ cups all-purpose flour, ¾ cup brown sugar, 2 teaspoons baking soda, 1 ½ teaspoons cinnamon, ½ teaspoon salt
In a separate bowl, whisk eggs, coconut oil, sour cream, and vanilla until smooth.
2 large eggs, ½ cup coconut oil, ¾ cup sour cream, 2 teaspoons vanilla
Stir into dry ingredients until just combined. Fold in carrot, apple, raisins, coconut, and walnuts.
1 cup grated carrot, 1 cup grated Granny Smith apple, ½ cup raisins, ½ cup shredded coconut, ½ cup chopped walnuts
Divide batter evenly among muffin cups. Bake for 5 minutes, then reduce oven temperature to 350° F and bake an additional 20 - 25 minutes, or until a toothpick inserted in the center comes out clean.