Preheat your oven to 350°F (175°C) and prepare your muffin tin.
In a large mixing bowl, combine the dry ingredients: almond flour, buckwheat flour, baking soda, baking powder, ground cinnamon, and salt.
In a separate bowl, whisk together the wet ingredients: maple syrup, melted coconut oil, eggs, and vanilla extract until smooth.
Pour the wet ingredients into the dry ingredients and stir gently until just combined. Fold in the grated carrots, applesauce, raisins or cranberries, and any optional ingredients.
Divide the batter evenly among the muffin cups, filling each about 3/4 full.
Bake for 20-25 minutes, or until a toothpick inserted comes out clean.
Allow the muffins to cool in the pan for about 5 minutes before transferring to a wire rack.